Do you think I'm actually happy for him?

It seems like you might deep down in your heart still slightly miss him a little and wish he would have treated you as good as he did her. It sounds like you just wonder what it would have been like and how far you two would have went if he would have just been that good to you. And although you didn't describe it, it sounds like looking at their happy honeymoon picks makes you feel like your relationship is not as happy as theres. Just remember that no one is going to post unhappy pics on facebook and no ones life it perfect. It's perfectly normal to feel the way you do, and you may think of him for years to come, but it will eventually fade until you think about him less and less. I would just try to keep my mind off of it as much as I could and it will just take time. Remember he didnt treat you good and you deserve better than that and you never know how he might treat her sometimes. It may seem like everything is awesome in thier relationship but looks can be deceiving sometimes. No relationship is THAT happy