One of the few times on this site that dump the person is applicable and appropriate.

And dump the "best friend". Best friends don't do stuff like that to you. They both seem like pieces of shit.

Well, since they're both pieces of crap, the better advice would be to flush them.

You have no need to apologize OP. He's in the wrong not you. So I agree with these comments. Dump his douche ass and the best friend can go to boot.

i wouldnt call that an argument. OP, thats really abusive of your bf. please get out of that relationship.

#55 You should stop trying to 'win' said arguments. Resolving differences makes both parties winners.

*Continues

And it will only get worse, not better. There's a very good chance this relationship will eventually become physically abusive.

I don't think that boyfriend even HAS a dick.

#32 you're right, he's to much of a coward to just tell the truth!

#32, he has a dick, it's just tiny because he shoved 3/4 of it into his personality.

#54 It doesn't have to do with winning all the time. My girlfriend and I hardly argue and that's because when we argue we both shrug it off. But really you don't need to go on different comments saying the same thing

Sad thing is, she'll probably stay with him. I've seen too many cases similar to these. For some reason I have the feeling the OP is going to allow the BF to continue to manipulate her and make her think it's all "her" fault he cheated. But you never know what else is going on in this case. Ex: I know this girl that was cheating on her boyfriend. Her best friend later told her BF about the affair and they then became closer and started to sleep together in some sort of revenge. Now both girls are fighting for the same guy because, God forbid they'll allow the other one to "win" him! Even best friends can be very catty and competitive.

Well I think in this particular case OP knows that it was a case of manipulation. She realized it after the fact. She got caught up in the moment and lost her courage and/or anger. This is a problem of course, but I think she knows she is not in the wrong here. OP stick by your guns!! Or, you know, don't even confront him; just leave cold-turkey so he can't drag shit out and keep you coming back. I know it's incredibly difficult, I've been almost exactly there, but you CAN do it.

just in time to not get him something for Christmas

Or she might want to get him a dildo for christmas, just so he can go fuck himself!

I wish I could give you 100 thumbs up on this comment!!

I know! I'd dump them both!

Haha you know Damn well that she is gonna get him something extremely nice for Christmas

Doubt she trusts her best friend now

I think her "best friend" already knows since she's the one he's cheating with.

Of course her "best friend" will help her leave. She's fucking him herself!