One of my BFs dated a married man AND after he left his wife she married him. EVERY single time they had a fight he'd throw it in her face "I left my marriage for this BS?!" OR if she did ANYTHING he didn't like then she wasn't as good as his exe and he should have never left her. Not saying that's always what happens just one example I've seen.

If the guy you have feelings for marriage doesn't work out then he's fair game and I wish you the best. Right now I think you are making a wise decision to not go after him.