Should I dump my girlfriend?

.Don't blame your girlfriend for a joke someone else may have pulled. Let her know it's not acceptable though and shouldn't occur again. If you're going to drop her over something so minor, it's clear you don't really care anything about her anyway...that sounds like an excuse to dump her to me.

I think you should tell her how you feel. It's not nice to play like this and her friend should apologize but the question is how did said friend get hold of your number? If your girlfriend tol her then she's got issues, if she had it already then maybe give the gf the benefit of the doubt.

If she loves you, she loves you. You have to trust that. Being bi doesn't mean she'll dump you for a woman anymore then her being straight would mean she'd dump you for a man. If she loves you, you have to trust her but if she's going to be playing silly, immature games then have it out with her, tell her you aren't impressed and much as you love her, you won't put up with it. How would she like it?

i dont think its a reason to break up with your girlfriend, im sure it was only a joke, my friends have done it before theyd say back off shes mine or something like that but we all laugh it off its just a silly joke, dont stress over it, but i guess in your situation it could be different if your girlfriends bi, its hard to give a point of view, it depends if she gets friendly with these other girls, then yes maybe its something you should have a think about or maybe just discuss how your feeling with her before any final decisions are made

Let me understand. Your GF is with you, and she also has had a relationship with another girl and you're mad and want to break up.

So what? If you still care about her, and she you, let bygones be bygones.

A female to female relationship is different from the one between man and a woman. (Obviously) Two women can connect on a level that men can't reach.

LET IT GO.

Unfortunately, this is one of the down sides of dating someone who's BI.

Who knows whether it's really a joke ? I mean jeez....you think dudes get jealous......hell have no wrath like that of a womans scorn.....

Your girlfriend could also be testing you. Chicks are like that......

You've only been going out for a month. Already having issues means it's best just to move on.