How do I politely tell someone to respect my space?

She is such a nazi that if I asked her to respect my space and that what she is doing is disrespectful, she will be offended for sure and not take it well. Even my family are affected the the actions of this girl because when the phone rings or she knocks on my door, they wonder what the hell is going on.

I also find it strange as to why her mother brings her around to knock numerous times in such a short span of time. If I attempt to relate to a normal parent's mind, I would be embarrassed to do such a thing and actually tell the offspring that maybe it isn't such a good idea and to wait till next time.

The word 'tons' applies to the emails, texts, calls to mobile/housephone and door knocking.
She is manipulative and controlling, and will do whatever to get her own way. If I say that I can't do something i.e go somewhere, she will put words in my mouth and tell me what to do. For example, I am battling with the flu and have told her I have no energy to go out. She will say, 'But flu lasts for 5 days'. Who is she to tell me what is best for me? What I should do? and yes, the symptoms of flu may last for 5 days, but the remaining after-effects still persist.

I am at my wits end, but I don't want to say 'f**k off'.

maybe try and get her a partner

Just make a story that goes like this....
Hey, can you please not contact me through my house phone you can say that there was a family member in the hospital and you didnt know because she engaged the house phone. Say you ran out of credit to reply to her texts when you just dont feel like replying. Dont open the door when she knocks (dont do that all the time though).
In the mean time find her a boyfriend.

just plainly tell her your family doesnt like constant phone calls and knocking on the door.

I am beginning to think she has mental/personality disorder from her actions such as frequent visits each month to the hairdressers to pay and have her hair done (when there is nothing wrong with it), to spending 6 hours per day to get ready before she leaves the house, to applying to study abroad to be close to an ex-boyfriend who cheated on her (who is living with the girl he cheated on her with).

Thanks for some of this advice.
I left her knocking and standing in the snow, but she reappeared later. (To be honest, I was sick from flu too). She had no luck with the door knocking that she resorted to abusing my home phone of which I did answer 1) From feeling bad from leaving her standing in the snow 2) I hoped that answering one would put an end to it all. However, I announced that I must go and eat my dinner. She had trouble respecting this, so I had to say I had things on the hob which was the truth. After dinner, I felt terrible from flu and went to sleep only for her to ring my home phone of which I did not answer and she left a string of messages. A few hours later, she was texting me again.

I do not know how she can be the person she is, or how she became the person she is...but one thing for sure is, she cannot go on like this.

Like I mentioned above, we are at unis at opposite ends of the country but for every friend she has at uni, she has driven them away. For every accommodation she has lived in, she has had to move due to fights i.e girls throwing jam at her door. I am now beginning to think maybe she had done something to trigger somebody to resort to such actions. However, she will obviously tell me a different story to win my sympathy.

Thanks anyway

anon or delete please.

Basically, i have a friend who is lonely and has no partner. She is very needy, clingy, selfish and emotionally draining. The world revolves around her. She leaves me tons of messages online, and if i am not there for her, she will resort to emailing me to texting me to calling my mobile to calling my house phone to knocking on my home front door. If this isn't an invasion of privacy/space, i do not know what is?

I am at the end of my tether as to what to do? I find it disrespectful and downright annoying/out of order. She is just a friend, but even her mother brings her around to my home (without invitation) to knock on my front door. (twice within 3 hours). I have already changed mobile numbers which was already irritating enough and now she leaves recorded messages on my home phone.

I have my own life and space, and any sane respectful person out there knows that each individual has a certain line drawn. This is just crossing the limits. It seems to me that this girl has emotional problems and needs to seek help for a personality disorder of some sort.

how do i tell her to leave me alone without saying outright, 'f**k off'.

No problem .
Has she recently broken up with someone? this could be the cause. I think she just wants male attention. I dont think you should say anything to her directly otherwise things can get worse. The starting point i think should be is to stop her ringing on the house phone. After that dont reply to her messages that often. If she turns up to your house, open the door and most of the time say " you should have told me you were coming, i was just going to visit (a family member/friend)". Or make up another excuse.

No problem .
Has she recently broken up with someone? this could be the cause. I think she just wants male attention. I dont think you should say anything to her directly otherwise things can get worse. The starting point i think should be is to stop her ringing on the house phone. After that dont reply to her messages that often. If she turns up to your house, open the door and most of the time say " you should have told me you were coming, i was just going to visit (a family member/friend)". Or make up another excuse.

Yes, I have come to the conclusion that she is. I don't want to think that she is crazy because she is a friend. Hence, why I can only feel sorry for her as she deeply needs help.

I saw the true reality of this girl's life (6hrs to get ready) when I was a guest at her home. I commented on this and she did not like it. We were meant to be out the door 11am, but she over-ran and was ready by 2pm past midday and the outing plans initially made were ruined. She made sure we didn't eat later on as a punishment.

The reason why I am at my wits end is due to the fact that I have tried ignoring her which does not work...I have tried answering once to put an end to it which does not work. My only last resort would mean I would literally have to be nasty to her for her to stop. I am not a nasty person by nature, I do not want to be nasty to her (Really do not, hence why I still haven't done so), but this is getting too much and interfering with my life and people around me, not to mention her poor ex.

1 yr ago her bf cheated on her to make the break-up easier. 1 yr on, she has devoted her university studies to follow this ex and be with him. He has a new gf who lives with him though (The girl he cheated on her with). Yes, she does like male attention. The last ex was her 7th relationship, not including all the regular weeklyone night stands she's had which would take the count of her sexual partners over 15 or 20 people for sure.

I have also noticed obsessive behaviour from her with regards to doing things in her life as if certain males would care, but these males have new lives with new gfs. E.g. 'So and so would love this, so and so's gf would be so jealous of this, I'm going to put this on Facebook so so and so can see it'.

To be honest, I don't think stopping her ringing on the house phone, or not replying to her texts would do much, as she will only resort to another way of having communication with me. She hasn't really left me any choice, to put it bluntly, currently if I could get a restraining order on her, I would.