<human>: Can you summarize the given text in a few sentences?

I broke up with my girlfriend a little over a month ago. We had a great relationship, but towards the end it was causing too much stress and affecting both of us far more than it should have. I wasn't giving her the attention she deserved, and I was sure that I stopped loving her. It was not a bad breakup at all. She got very upset, but she understood why it was happening and we agreed to be friends. Things were going very well, I would text her occasionally, and we even hung out together with a group of friends. About a week ago, we were talking and she went on and on apologizing about how "she ruined the relationship" and how sorry she was. Then she went on saying how she wants to be close friends because I was important to her. I told her that we would see how things would go.

Last night she texted me this long message about how she just can't get over me and that it's affecting her too much. Then she told me this in depth story about how she got drunk, hooked up with a guy, and never got a call or message from him. This had happened a few days ago, a little less than a month since we broke up. When I heard this I got so angry at her, and pretty much told her I didn't want to see her or talk to her. I blocked her number and deleted her from all social media, and am really feeling down from all of it. I was doing fine with being single up until I heard this. I know it's not fair for me to be mad, because it was my decision to break up with her. I'm just really confused with how to handle this recent bout of emotion brought upon by hearing that. Thanks for any advice yall can give me!
<bot>: broke up with gf, a month later she hooked up with someone and I got upset, blocked her from everything after being friends