<human>: Can you provide a brief rundown of the text in within 3 sentences?

I've made a throwaway to discuss this in case he knows my reddit account.

I've always been insecure about him talking to his exes, but we both do it since it's a fairly small town and both of us were friends with our exes before dating, so I try not to let it bother me. Once when we were drinking, I asked him if he could stop talking to them for me, and I would stop talking to mine. 

I hate to be that girlfriend and ask something like that, but it's the way I felt. He told me they were his friends, and he could talk to them about the things of his I'm not interested in, like books and medicine.

I'll admit that I'm not his smartest girlfriend. All of his past exes were college or university students, and I'm just a single mother who doesn't do much but clean around the house and watch TV occasionally.

There's one ex in particular that's been bugging me. We were having drinks at home one night when he started seeming a bit sad. After some prodding, he told me about his most recent ex.

Me and my boyfriend were friends before we started dating. I knew he was seeing someone, and one night at the bar, we were sitting around with friends and he was quiet, another friend asked him what was wrong, and he said he broke up with his girlfriend, it was his doing, and he felt awful about it.

Shortly after that we started seeing one another.

8 months later, he kept in touch with that ex, and he still feels awful about breaking up with her. He said she started doing drugs, and drinking everyday. She wound up getting stuck in an abusive relationship, and he said he feels responsible for it.

I didn't know how to respond to him after he said it was his fault, so the conversation ended.

Am I wrong for feeling bad about this? Should he care about her like he does?
<bot>: Boyfriend feels like exes mistakes are his fault for breaking up with her, and it bugs me because I feel like that means he still cares for her.