Nothing. 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.
Leave him alone. He's already with someone else. Find someone who's single and date them. There's plenty of them out there.
Leave them alone!
Just be yourself but act a little sexy around them when ever you aren't talking about their girlfriend. If they ask if you are flirting, just say that you really admire them. I'm a 13 year old boy. I know this. Someone has pulled this on me already and are my current girlfriend.
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.
his girlfriend Grace!
Say the same things you would say before but not sexual things, but still be nice and friendly to him
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.
Answer- If she is already your cousins girl friend then you can't ask her out, she is already going out with someone, just wait until they break up, or move onto someone else. Your cousin is your family, you will have him forever, but a girlfriend is usually only temporary.
Leave them alone together. Find someone else to like.
Calmly remind him of the fact she is already with someone, and ask him to stop.
Well he already has a girlfriend and he is not that mean to cheat on someone so I'm saying he wouldn't cheat on someone