The other day I went to a formal function with my male cousin because I couldn't find a date, so I brought him with me. My girlfriend came along to the function but without a date. However, I thought she would be bringing one. My idea was to make my cousin and I seem like we are an item at the function because nobody knew that he was my cousin except my girlfriend.
My girlfriend, however, knowing that he was my cousin, took advantage of the situation.
When a slow song was playing she asked my cousin for a dance and being a good guy he didn't refuse. They were dancing and stuff and then someone from across the table from where I was sitting, asked me whose date it was and I said mine. During the whole function my "friend" kept hogging my cousin and therefore kind of blowing the cover. She kept pushing herself on him and stuff like that. She even asked to sit beside him and I asked her why and then she became upset with me and blantantly whispered, "Go F**k your cousin!" I was shocked to hear her say this so I exchanged seats with her so she could sit beside him. My cousin even told me that she kissed him on the neck good night and I was there!
Do u think that she had any regards to me as her friend? Why was she behaving this way?
Should I still talk to her?

Sounds like she's a little crazy! Lol!

I'd certainly ask her why she was being like this, and if she can't give you a reasonable explanation I'd be reconsidering your friendship!

Maybe she was jealous you actually found SOMEONE to accompany you?

Girl no don't even deal with the bull let me put it this way what if you brought a guy you really liked your guys wernt dating but you wanted to and she did that?? She back stabbed you that's not a friend drop her like a bag of potatoes because she will do it againg and again and mabey with your bayfriend in the future!!