I'm in love with a married man and I'll never see again
Why would you fall in love with a married man?
When I imagine a life with him it seems to be free of troubles.
I understand that it's difficult to control your feelings about him. You have to remember he is married to someone else and you should move on with your life.
Relationship status means nothing.
It's hard to control your romantic feelings towards others at times, but he's married and committed to someone else. Do you want his partner to be hurt? Wouldn't you feel awful if the roles were reversed?