You don't - move on and don't dwell on this. "Getting back" at someone is a childish behaviour and emotion. If you just cannot be friends and are not compatible accept it and move on - that's it.
* Your exes friend is worried about you telling your ex (now that you are back together again) about him/her flirting with you. He's afraid he has been disloyal to your ex as a good friend and he fears you might have told a girlfriend or two and it may get back to your ex.
You don't
You date her best friend
There is a few things you can do to get your friend and his ex back together. You can set them up on a bind date r you can just tell the ex that your friend is wanting to go somewhere and talk.
just tell your best friend that you really like him and see what she says about it.
if he was your ex you should be over him. If your not over him you should tell your friend or try to get him back.
do theyre best friend of course!
Ask them for it.
i want my ex boyfriend back in my life now he got a new girl friend after the break up please help me..
talk to her she will understand if she is your friend
Chances are, he/she is.
appologise and arrange a date