I'm not gonna say the whole story on here.
Most Helpful Guy
Having feelings? That's not "bad" - you can't really control who you have feelings for.
Taking action on those feelings? THAT is bad. You need to respect his marriage, and believe it or not, if you come on to a guy and he cheats on his wife with you, he won't respect you, even if he happily bangs you on the side, He is also very unlikely to leave his wife for you.
The world is full of single guys - stay away from the married ones.4