Are you sure it's because he didn't have free time? That sounds like something a person says when they don't want to hurt your feelings. You should ask him directly, just be prepared in case it's not what you were expecting.
Yeah... I think you've already waaaay overstepped some serious boundaries. Maybe you should do yourself a kindness and go for guys who aren't completely unavailable from the start.
And if it weren't you, he would have picked someone else. I get that. You still chose to get involved, which is just bad on all kinds of levels. When it comes to what you want and deserve, do you really want to be someone's side dish or do you want to be treated as their equal partner? A married man will never consider you his equal. If he leaves his partner, is that what you want? To be with someone who seeks out side action when he's in a committed relationship?
He obviously broke up with you for a reason. Also he is married and needs time to breathe. You really should leave him alone and find someone else...just saying
Yes and he broke it off with you so leave him alone as hard as it may seem....are you that desperate that you are going to try and force him to want you ?
It may have been easy at the time but now it is over and time to move on, hopefully he can make amends with his wife and family and do the right thing....