He kissed your sister? Omg, yes. Don't stay together if he was like, making out, with her, but if it was just a peck on the cheek, stay together. And if she was trying to kiss him, then be mad at your sis, and keep the boy if he didn't want to but was forced.
break up with that fool
break up with him!!!! if he'll do it once, he'll do it again!
Break up with him. He isn't worth it.
it isn't right you should break up with him lol
you should tell your boyfriend how you were feeling at the time of the break like for example you may have felt lonely and vunerable and you needed someone to be there and that its not your fault but his mate's fault because he took advantage of you by kissing you even though you were already going out with someone else hope this helps xxx
break up with him.
Break up with him, he doesn't deserve you.
definitely break up with him. that's what i would do. definitely definitely definitely.
uhhh...you break up with him because he just kissed a girl that's not you!
No you should break up with him.
break up
You're jealous, so back to her.