Breaking up with your GF was a VERY tough decision, but you did the right thing and you should be proud of yourself for that. I think now that you realize you want to stand for your M that you're going to feel a lot better and less confused going forward. Hang in there, you're doing great!
I'm not convinced of that!
Stand for my marriage? I may still love W, and I might even still want her, and I would do literally anything for my family, but my marriage? My marriage is a sham! It's been pissed all over. Maybe there's a someday where there's another relationship with W, but it's not this one!
I'm "proud" of myself about GF in the sense that I was able to do what I thought was the right thing, rather than the thing that I wanted. I'm not proud of anything else. I am completely without doubt that I love her, too. Completely without doubt that I have WRONGED someone special, who never deserved being hurt. There's nothing to take pride in, there.