Might be ex fiancee depending on how bad it was. Admit you were wrong. Admit to being stupid or an idiot depending on how bad the mistake and promise never to do it again. Ask if she will forgive you. A hurt puppy look wouldn't hurt while you do this. In a couple of years she might start to believe you.
With sincerity. How else.
cry. its a winner.
apologize to your girlfriend first, then sit down with her and have a real conversation. Explain to her your feelings and how that lead to your actions. Explain to her that you understand that you have made a mistake, and apologize once again. Communication is key if you want to have a lasting and meaningful relationship.
you say how sorry you are and apologize to him and his girlfriend
You take her out to dinner and buy her ice things and basicly apologize.
Apologize, mean it. Admit to being an idiot and hope for the best. Never do it again.
There are several possibilities. i apologize to you. I apologize for my behavior. I apologize with contrition.
Take blame & be a little more sensitive,apologize
Apologize! APOLOGIZE! APOLOGIZE!
If the girlfriend did something wrong, it's usually best to simply apologize to the boy and ask for forgiveness. He will probably be impressed by the girl's courage and sincerity. But make sure you mean it!
You apologize
There is nothing better than you apologizing on your own.I think it better, but if you can find a perfect song that would be very ROMANTIC.