ok so my cousin estola my boyfriend while i was absent from school what should i do

Clock her, right in the jaw.
But if you're like one of those "violence isn't the answer" then just. Calmly approach her, and tell her about the problem. Address your problems to her in a kindly matter. Tell her how it makes tu feel....

But then again, I don't play like that. I'd open a can of whoop culo on her.

Beat her bucking ass.

I agree with 8theGreat. Neither of them are worth your time. Nor the trouble you'd be in if tu whooped her ass.

Yeah... KIck her ass!

Neither of them are worth it.

There a plenty of other, better guys.

And kicking her culo will only lower tu to her level, just leave it and mover on.

I wish my cuz would tryda still my BF 5 fingaz 2 dhe face!!!! GIRL BYE!!!!

your boyfriend could not have loved tu that much if he is so fickle, find someone else! XD

Both of them aren't worth your time.

...

Obviously your ex-boyfriend had free will, and agreed to go to your cousin - so they're both very guilty.

Forget him, I know it's hard, but tu need to in this case. Go get a new one, and make sure he loves tu instead of leaving you.

I'd let them burn eachother in that relationship.