Do I Tell Her?

by Kayla
(Indiana)

Okay, my bbf is now bck with her ex. It's great because she loves him but bad because he's not good for her. He is a player. Within 24 hours he broke up with his girlfriend, flirted with another one of my friends by telling her he loved her and tht she should dump her bf for him,then flirted with the one he's dating, then back to my other friend. And then at lunch today he was flirting and touch two more of my friends. He has also cheated on my bff before, and has addmitted it to me.

What do I do. Do I talk to her or just let him get what he wants?