Dear Kim,
He has an admittedly selfish side and trouble committing, and you married him? Then he acts on these character flaws and you continue to believe that you are in love? What are you in love with? Really, you are in “love” with him and can’t let go of him because you can’t have him. If he were ever to commit to you, you would no longer feel “love” for him and leave. So you need to leave, figure out what real love is, them try again. When you figure out what real love is, you may opt for casual sex for the rest of your life, because it can be very, very tough to choose to love someone.