I would like to talk to her. I would say:
„Hey. I really do like you but I don’t think I can keep it up any longer. When I am with you, when I see you at school or anywhere else, I am happy and enjoy it. You also seem to like me. But then, when I asked you to hang out, something is different. We’ve had plans to hang out for three times and every time something came up. I am not sure if I can survive the disappointments any longer. You say, you don’t want to go to the movies with me, because you don’t want me to pay for you and your dad doesn’t want to give you the money? I wouldn’t let YOU pay for it! And then you make plans with other people to go to the movies… But when I see you again, you are the nicest person in the world and I don’t know what I am supposed to do. I will ask you one more time to go to the movies. I will call it a date. If you say you don’t want to go, just say it. And I am not trying to make you feel guilty. Technically, there is no way I could do that. Either you like me, than you’ll be happy that I like you as well and we can just do what we both want, or you don’t like me and you won’t care.
Maybe you are just shy and afraid of going out with me. Please don’t be. I am not able to tell the difference between being shy and not liking me. When I saw you again today, at the party, you seemed to be happy to see me.
Well, I cannot take any more disappointments and I need some input from your side. I don’t know if you noticed it but I was a little depressed the last couple days. We did not talk during these days, because I did not talk to you. That means, that you don’t talk to me either. Every time we talk, it is because I come to you and talk to you. I message you, I call you, I walk over to you. There is nothing coming from you.
Maybe you like me but you don’t want to date or do anything else than talk when we’re at the same party or in the same class. I would not like that. I only have 37 days left before I go back and I know that it will be hard for both of us and that it will be even harder if we get any closer, but you are intelligent. We can make it; you know that it will only be for 36 days.
Now I am waiting. Again, I am waiting for your response. Please say something. Even better, say the truth.“
That’s what I would say but unfortunately I can’t.