I know you are in pain and nothing can really ease up the pain that you are caring except time...and all your emotions are so valid....
there is nothing wrong with you....actually, I think he's the source of problem.....wait my friend and be patient....the guy who jumps just so quickly from 5 years of relationship to couple of months of relationship and gets married with the girl, is not a right guy....I can promise you that he won't stay with that girl either....Poor that woman who has to deal with him and lucky you who is out of that relationship while you are still young and you have time to heal and find a decent guy.....
I was here months ago, crying and talking about this guy called Aaron who moved on so quickly and posted even on his facebook that he's in a relationship with the new girl...so quickly like within a months....but guess what? that relationship didn't last even couple of months.....They broke up and he told me that the girl has dumped him.....I'm sure he was doing same things that he used to do in our relationship....
Anyway, my point is that these guys won't change...There is no cure for them....It's just wasting our time and emotion to stay with them.....just let it go....and I'm sure you can manage....even look at it in a positive way.....He was there to show you a way....to show you that you can be strong and when you find that special person, you will appreciate his love a lot....
take care of yourself and try to be good to yourself....and do whatever to not think about him....
If I were you, I would not answer his phone even anymore...What's the point really? Show him that you are strong and you moved on.....
Take care
Marjan