<human>: Me and my girlfriend were really close. We dated for almost 7 months. She was my first love, and there wasn't anything I wouldn't of done for her.

She broke up with me about a week ago because she is going to a different college than me and she didn't want to work the long distance. 

The breakup has been okay for me, honestly it makes me feel worse when I text her or talk to her. I feel like she's bringing me down.

Since our breakup she has been drinking, getting drunk, and partying almost every night since. She also, had sex with her ex (the boyfriend right before we started dating) just 3 days after we broke up. That killed a small part of me and it honestly hurt me more than when we broke up to hear that. She was texting him and started re talking to him when we were dating.

I have a few questions;

1: Is this considered cheating? Since she started talking to him again while we were still dating, and it was only 3 days after we broke up.

2: Why do you think she did this? Is she trying to upset me? Is she just trying to rebound?

3: Is she worth trying to be friends with her? I honestly don't even want to talk to her anymore

4: What kind of reaction should I have to this? Should I just ignore it since we broke up? Or should I be upset because she was texting him during our relationship?

Thanks for the advice!

Can you condense the text into three sentences or less?
<bot>: girlfriend broke up with me and after 3 days had sex with her ex-boyfriend. Is this cheating? Why did she do it? Is she worth being friends with? How should I react to this situation?