Human contradiction

I liked a guy we both had an intense connection(he is just my type) later I will discover that he is married and he has children.
That was so damn painful and I felt betrayed.
I saw him today he was still want to talk to me I told him that I can't go out with him and I made up some excuse.
He sad like, he's unhappy and he wanted divorce he just doesn't want to hurt his kids.
He makes me feel like that I let him down and I judged him before knowing him.
What do u think?