Fact is, that it depends on what kind of relationship. If they are married, then you should respect that union. People make their own decisions, whether we see them as good or bad. We can't make choices for people. The best you can do, is be there as a friend. If things are meant to be between the two of you then it will happen in it's own time. Just be there, care and everything will work out. If you don't want to just be friends, then move on. Sounds rough, but it's the for the best.
Leave them alone!
Leave them alone together. Find someone else to like.
Try flirting with him/her, but not in front of their girlfriend/boyfriend. But then again, be friendly, you may want to be FRIENDS with them first.
speaking as a boy, i say that you try to take your mind off it by doing something you love and just do that until you like someone else.
No Justin Bieber does not have a girlfriend. He is totally single.
i have been in the exact same situation and you tell him and then ask if he likes you back and if he does then say do you wanna date or something like that and if he doesnt then he doesnt
Don't. Simple as that. If he has a girlfriend, he's already made a commitment and like it or not he's with her. You don't want to be a home wrecker. Trust me. Go look for someone else and you'll be happier in the long run.
If someone is taken: don't flirt with them, don't gain feelings for them, don't make them gain feelings for you, don't make them confused about who they want, & don't be a homewrecker.
Respect that he is already in a relationship. If he is worth anything, he would break things off with the other person before getting involved with someone else.
He could be, but he's not allowed to have a girlfriend.
When a guy says he would date you if he didn't have a girlfriend, he is being nice and letting you know that he is already taken and that you would be someone that he would consider dating if he wasn't already with someone else.
if he has a girlfriend maybe he isn't your true love.....think about it