OK so my bestfriends boyfriend cheated on her and then she took him
Back and made him promise never to talk to the girl again if she got back with him.but today she had his pohone and he got a text message and it was her and he been texting her and said I love you to her
So now me and my friend want something really mean to do back to him please:)
Pranks anything:)

Best way to get back is dump him and get on with her life.
Let him see she is better off without him.

Ignoring him is the best way to go.
Making him think that he meant nothing to her would hurt him more than petty revenge.

I agree with the previous posts. Don't sink to his level

Go about your business, no need to "get back at him", it's not your place. That just shows how much control and influence he has over you, I mean her. The biggest insult you could ever give him, if that is your goal, is to do nothing. Just move on, tell your friend she is way too young to be having any kind of serious boyfriend, and enjoy your youth. No petty games. It shines poorly on you.

Have you ever heard "what comes around goes around?" Well, he'll get his. And if you do something mean to him, you'll get yours too.

Light him, on fire...
Noooo, maybe..
Look, I'm joking, of caurse, but there arefolks here who are too much on theyr high horse to take a joke
The only way the get back on this [naughtywordohno! ]er is leaving him, never taking him back and forgeting about him
Tell your friend that he isn't worth her trouble and to just forget about him