I know you can't help who you fall in love with, but if you're interested in
someone who is taken, you need to let it go. Why would you set yourself
up for a guaranteed heartbreak? I've known several women who started
dating married men, and none of those men left their wives. Don't be so
desperate for love that you're willing to let yourself be used by someone
who already has somebody else.
If you chose to start a relationship with someone who is taken you'll be
making a huge mistake. This is not a romantic or realistic situation. This
selfish cheater won't truly care about you. This person will not respect you.
You deserve to be with someone who wants only you.