I think the reason he did this kind of stuff is he's a lying, cheating a$$. Maybe there are some deep psychological reasons for his behavior, but that's really his problem to deal with or not, and not for you to worry/think about.
You need to realize that he's the loser, in every sense of the word. You now have the chance to move forward and have an R with someone more emotionally healthy and loving.
I do think sometimes our families influence us. I don't say that as any kind of defense, or anything, just that I've noticed that people who have lots of divorce in their family maybe come to see divorce as a quick solution to dealing with marriage problems, which come in every marriage. My X's siblings have all had several marriages already, and they're in their 40's. I do intend if I ever get in a serious R again to spend a lot of time meeting that person's family, parents, siblings, kids. I didn't think of stuff like that when I was young!!!
