<human>: Can you condense the text into a few key points?

We're both 18 and have known each other for two years through college. 

Im kind of an awkward and shy guy with a lot of issues but I'd like to think that Ive got over a lot of them and in a way she has helped me be less insecure and more open with my feelings. 

Around January this year, I realized that I actually was falling for this girl but really felt I couldnt tell her about it. Typical thoughts of self-doubt and the like. Anyway, eventually in April, I asked her to prom and she said yes. This took a lot of courage and I thought it'd hint at me liking her but it didnt seem to flow and I realized that I was interested in going with her because I was in love with her but she wasnt with me. 

Of course, I had talked myself out of going to prom at all and told her I couldnt go with her. It took a while for things to be explained fully to her that I couldnt go with her because I liked her and didnt want to ruin prom because of that. She said she understood and we talked as normal from that point on but she never said anything about it so Ive kind of been left really confused by this and not sure what to do. 

Exams and such came up and I havent seen her since early July. My exam results come out on Thursday and I have a chance to maybe see her there, but its a slim chance. After that, I have until the end of the summer and then Im moving to Sheffield from London and will probably never see her again unless I get over my issues and fears.
<bot>: I have until the end of summer to tell girl Ive liked for two years how I truly feel about her before I move cities and we might not see each other again. What should I do?