you just play along with him and when he says he is going on a date with her you follow them and when you see them you come from the other direction and act all suprised
you try to get proof that she's lying and then when u get it, show it 2 ur friend
Then the real question is why isn't your best friend your girlfriend........?
The duration of My Best Friend's Girlfriend is 1.92 hours.
My Best Friend's Girlfriend was created on 2008-02-13.
Sharing your girlfriend with your best friend is the ultimate demonstration of your friendship. It is even more meaningful if he does not have a girlfriend.
Get rid of so-called "best friend". If you're girlfriend is true to you, she will stay with you.
If your best friend is your crushes girlfriend then you haft to tell her. It will only become a problem if you are secretive about it.
Well, it depends on if you like your girlfriend, if your best friend is a girl, then trust me she should like you back.
Yes. Unless your girlfriend is bisexual, and her best friend is bisexual or gay.
Grow up, please. If you like your best friend, you don't love your girlfriend. You girlfriend cheating on you is not reason or justification for you to do it back. You didn't like being cheated on, did you? So why would you do it back? You obviously forgave her & tolerated it. If you can't, LEAVE YOUR GIRLFRIEND. Do not go out with your best friend if you're not single.
make your girlfriend jealous
you need to tell your best friend that you do not like them that way.