<human>: Warning, this might be cringeworthy by your standards around here.

Our relationship was always alright, I guess. Sure we're young so we had our share of petty arguments but at the end of the day it always seemed we 'loved' each other. I never saw the break up coming.

We broke up over the summer, you know, one of those Teenager-type deals, just didn't go well over the summer. We got back to school and she had a new boyfriend; however she always sub-posted about me on all of her social media. I decided to text her, and she came to the conclusion she would break up with him, stay single for a while, and get back with me. Immature, I know.

But I was love-struck and was okay with it. We hung out that weekend at a festival downtown, talked to her afterwards and she seemed serious, told me she wished nothing had ever happened and that we could be like we used to be. Fast-forward a week or so later and she says we shouldn't talk anymore- she just needs some time alone. I text her a few days later telling her I wasn't there to fight for her, just to talk to her. I find out today she is back with the other guy.

I don't know how to feel. I don't know what to do. Part of me wants to tell her and him off, but I know that's the immature route and would get me no where. Another part of me wants to be friends and see if I get anywhere. Yet another part of me just wants to cut her out of my life completely.

This whole situation has messed me up mentally. I can't ever think straight, I'm abusing drugs, I'm always in a bad mood.

My question is how should I handle this. How should I approach this situation as a whole. Let it go? Confront her? Cut her out? And how do I go about any of it...

Can you give me a shortened version of the text?
<bot>: Ex wanted to get back together, feeling was mutual. Cuts me off "needing time alone" and goes back to other guy. I don't know what to do.