<human>: Can you provide a brief rundown of the text in within 3 sentences?

Hey everyone this my 1st submit to any subreddit(i'm glad i found this one :) ) ever and also English isn't my first language, so sorry for any grammar mistakes and too much text.

So I'm 17 years old, 3rd year of High school.During these last 3 years I've been acting really anti-social, i would not talk to anyone during school, only to my best friend that i know for very long time (when i was not antisocial).People would always ask me why am i not talking and try to talk to me.Lately I've been more open and talkative and i already see results, I'm invited to parties, going out with them, talk etc.

Now that I've solved that problem, there is one girl that i can't stop thinking of(i'm happy when i get some sleep now and then), I'm crazy about her.The thing is while i was anti-social she was trying to be friend with me, we were sitting together during classes, and i was acting like a jerk.Now that I've stopped being depressed i don't know how to start over with her, even to be friend.Once I even told her that I'm crazy about her, and she responded saying that she is currently in relationship and we could maybe go out sometimes.I just ignored that cause i was really sad i thought it would be better just to forget about her, easier said then done...Since then we haven't spoken 1 word, not even hi and we go together to class.

I would appreciate your thoughts and help.I am not afraid to ask her out just i think we have nothing in common(maybe that we like video games) and it would be really hard to start conversation with her then.. :(
Or i should maybe just give up?
<bot>: Crazy about girl in class that i have hardly ever spoken with for 3 years that i know her, she knows that i like her, can't start a conversation because nothing in common