Moving on

you struggle with rejection because you are not confident about yourself. be confident and love yourself first before putting yourself on the dating scene. this way if you get rejected, it will not bother you as much because you will know your worth.

but in life, not everyone is going to like you, and that's okay. you're not for everyone. no one is for everyone. there's different characters, likes, dislikes and interests. everyone is different. but one day you will find that special person who will like you just as much as you like them! <3

What shall I do next time I see this girl who turned me down? I know it sounds silly but I dont want to react in the wrong way or wine to her.

Just be cordial and polite, act normal, maybe smile. Act as if the rejection didn't bother you or affect you in any way.

But it did bother me and affect me in every way I can think of - my confidence is at an all time low. As I say this now it sounds ridiculous but all I want to do is tell this girl how I feel about her without sounding desperate.

That moment has passed I'm afraid. Think of it from their POV, they've turned down your advances and then you continue to profess your feelings for them. It's very awkward and you're basically consigning any possibility of friendship to the bin at that point. Respect their wishes and see if you can salvage something from it.

I suspect you're falling into the trap of waiting too long to ask people out. You need to do it earlier so that people declining doesn't feel like a huge emotional setback. If you wait until after you've developed strong feelings it will inevitably feel like a breakup even though you were never in a romantic relationship. If you like someone it's fine to use the dating bit to work out if there's anything there. Don't wait until you are doting on someone.

You shouldn't be down on yourself just because someone didn't want to date you. There's lot's of reasons that might be the case and at the end of the day, they like you enough to be good friends for months. They obviously think you're a cool person.

Is there a way of telling her this without sounding completely pathetic?

Not really, no.

I'm presuming that you've ask them out and they've said no? If so, professing your feelings is a really, really bad idea.

No i never asked her out, just yold her im interested and would like to know her better.

In your first post you said you've been "rejected" by them. This means they did not positively to whatever approach you made, right?

Yes I said rejected because she said she is 'seeing someone' but that could mean so many things right? I think She reacted fairly positively as she started laughing in a cute awkward way and she said 'ill see you around'. Maybe it was her way of saying I dont know you well enough or keep trying? I dont really know

I struggle to move on because my parents were divorced when I was younger.....my dad kicked me out of his life and therefore I struggle to let people go. I dont know how to get over it and I feel this is the main reason why I am so very bad at moving on.

Sounds traumatic, perhaps get some counselling to help work it through. Dating success and decent relationships do come along with tenacity and patience