Is this the end? Is it over with a Girl I like?

Hello There.
I like this girl,she likes me,people at university on a university trip noticed and we get on good in person.However it's all gone wrong and feel bad luck again is here for me.I asked her briefly twice in person,when walking would you like to meet up and she said yes.
I asked her at the end of term and said would you like to meet up and go out(basically for something to Eat) and she said we can sort this via text)
I then text her a week or more later asking when she is free,she said she is busy(told me she works a lot nearly everyday and doesnt have much time for anything) but she said we can go out in summer,obviously I text and say keep me posted when you are free and she said she will/absolutely.
It's been June,July and then August soon
I randomly called her and no answer.She texted me back right away next morning and said sorry she asleep.
I then did a follow up call and no answer.
I left a text saying when are the best times to call you,you know the most suitable times.
No reply in 2 weeks (15 days) I have left it to see and I am not desperate and a little busy.People tell me leave it and see what happens.
-She is busy(but people say it isnt a excuse)
-She is introverted shy
-She said 2x in person and 1x via text she is a bad texter
-She use to call me instead of texting but since we live far away it is like I am too far.
For positives.
.
-She plays with her hair
-Blushed when I asked her
Blushed while looking at me in the eyes talking to a freindly uni guy student about she can be flirty.
-Asks my ethnicity/family
slight touches/acts of care for example hiding that she was going to wash something off my leg with water but Didnt
-Girl a PhD said she asked where I was twice in 1 hour
-Never liked me or let me buy her a drink.
-stands by me while I talk to other guys
-Did random sports together in spare of moment..just got changed.
-Use to call me to go with her in the taxi.We went shopping/store browsing all shops even girls.
All this for what?
I have been In a bad way for sometime and was very very upset and also confused.I think I have mostly walked it off with long walks with jogging and nature Miles and miles of nature walks in my own. I have mostly had watery eyes and cried it out and as I guy its hard as I really like her and felt a connection and unfortunately strong feelings for her.I just really wanted to drive her and take her out.It felt great looking after her and watching out for her while about and in on buses taxis.Of course I am young but people noticed I am an old school gentleman.
The funny thing is I sometimes think when the next semester begins and we will see each other in person..she might just start taking to me again since we are in the same Class

Honestly, I don't think you like HER all that much.
Ofc this is my opinion from what I've just read and what I've perceived it as, but I think you like the feeling she gives you, rather than her.
If she isn't reciprocating, then it's best to just let it go and stop trying, especially after multiple efforts, it'll only leave you hurt.
She seems like a busy girl, and if she can't make time for you now, then you can't really change that. Perhaps, when she can, and if you're still interested (for e.g. next year), you guys can rekindle and make things work.
But you can't control someone else and you can't make someone like you or put in as much energy as you, so my best bet is just let things play out and live your life. It's going to be hard, esp knowing that you felt passionately towards her but do things that make you happy and try to enjoy your summer, instead of thinking too much about it.