Can't tell you how much plain negativity I get about this subject - when all I'm doing if trying to find peace.
I think a lot of that is just the age difference. I am at the point in my life that I can kind of look back on it and see the patterns.
I can tell you he isn;t exactly surrounded by the best people.
It's easy to draw the conclusion that he's acting this way because he's being influenced by his associations. However, it's more likely that "birds of a feather flock together."
Do you think he'll ever come around again??? Friends think he will, but not for a while. That is if he is not with that other girl still.
I agree.
To add insult to injury, the girl is 10 years younger. (I'm 34). He's gonna be 31.
Not relevant. Would you really feel better if she was older?
Then I found myself feeling liek I did something wrong - or trying to figure out what I could have done different.
That's very common and is based on your personality makeup. That's a trait that I have also. When things go wrong, personal or work, my first instinct is to blame myself. It sounds like his is to blame someone else. That's where you've got to learn to look beyond the emotions to see what's real. The logic here is "I feel it therefore it must be true." Actually, emotions can be very deceptive. The old adage "Don't let your mind tell you what to feel and don't let your heart tell you what to think" is very applicable.
Even felt guilty when he came over the last I saw him to drop off his "dear john" letter, and he learned I was out on a date. He has the nerve to say "you weren't even going to tell me". WHAT? I was angry. But I feel guilty about going out with that man!
That's not uncommon. I had a woman break up with me, move a guy in the next week, then get mad when she found out I was dating someone. Really, the same answer as above.
I'm going out with him a second time tonight and feel guilty again, like I'm doing wrong! I hate it.
This is where objective outside feedback, from someone who isn't emotionally involved in the situation, can be very helpful. He cheated on you and is involved with someone else. That ended your obligation to him. Even Jesus told his followers it was ok to divorce a cheater!
Healthy guilt is the emotion that tells us we've done something wrong and we should never do it again. Neurotic guilt is when we feel guilty when we haven't wronged anyone. This is definitely the latter, and you need to confront it as such. This is where you have to use your mind to override your emotions, reminding yourself "HE cheated on ME! I'm not doing anything wrong."
As hard as it is to believe right now, you won't always feel this way. As a friend said to me once, "The sun will shine again." It's hard to believe now, but it's true. The day will come you will look back on this as just a bad memory, separate from all the pain you feel now.
A healthy question right now is "What can I learn from this?" Also, "What does this tell me about myself?" I kind of suspect you may be so kind-hearted that you allow others to take advantage of you, but that's a question only you can answer. I suspect you need to learn to hold people accountable for their own choices and not let them "dump" blame for their behavior on you.