As I gaze into my crystal ball, I see a lot of bitterness and loneliness in your future. You are not heading in the right direction, friend, and I hope you’ll listen to the advice we’re trying to give you.

Listen, this is not your girl. It sounds like she was never that into you in the first place (except as a friend maybe) and she made out with this other guy because she wanted to make out with him. There’s no mystery here as to why it happened. She handled this badly, for sure, but you know, she’s in high school. We’ll have to cut her some slack.

If you’re not interested in making peace with your emotions, you may be in the wrong place?

This is my best advice:
– Try to stop obsessing about her. You were hurt. You got your heart stomped on. It sucks like hell but we all go through this.
– Let go of your anger towards this guy, who has done nothing wrong. He was into her, he didn’t know she was ‘taken’, and now she’s his girlfriend. No foul. He’s not your ‘mortal enemy’ for goodness sake, get a little perspective.
– Be less “picky” about your relationships. Stop ranking girls according to how beautiful they are, and start thinking about what they have to offer personality-wise. There are other girls in your school you could have a relationship with. Maybe a successful one.
– Get a handle on that depression you’re building. It will only get harder the more you let it set root.

My best wishes for you. I’m sorry you were hurt by this girl. I’m sorry you’re in pain. The only way out is to let go, though. Good luck.