<human>: I've had a small one-sided crush on a girl that I go to school with for about 3 years. 

She was everything I wanted. Nice, smart, beautiful, etc. 

I recently started talking with her (since mid-late June) and we hung out a couple times. But since then, I've been almost completely ignored at times and it started filling up my "anxiety balloon". 

I feel like she's been stringing me along and treating me not like a friend at all. She's driven off without me, ignored about 80% of my messages and snapchats, never wants to hang out and today was kind of the last straw for me. 

Context: we promised to go to a carnival event with eachother this week but 7 days ago, she suddenly cancelled on me, saying she had to take care of some people. 

Then I open up my snapchat story to find her at the concert at said event. It shattered me. It felt like someone had kicked my heart into my stomach.

I know a lot of you guys will say stuff like "she probably forgot" or "plans change around often" but she's used those excuses too often. 

I messaged her and told her the truth about what I really thought about us and that I'd be leaving her alone for a while. She said she was "sorry" and that she "tends to shy away from people who get attached to her". 

For some reason this made me ridiculously upset and frustrated and I messaged her back saying "If you shy away from people like me, I'll leave you alone from now on."

I feel like shit at the moment but at the same time it feels good to have to not worry about her. She's not my problem anymore.

I would have given her anything she had wanted because that's how hard I fell for her. I probably messed up my one chance with her for being impatient and selfish but maybe it's my just desserts for being a terrible human being.

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Can you condense the text into a few key points?
<bot>: Boy has crush on girl, girl mostly treats him terribly, boy feels betrayed and decides to go on a hiatus for a while.