My boyfriend's cousin is a douchebag !!!

Je

When bf and I first started dating it was a bit Rocky...we went out with his cousin he pointed every single girl he wanted to bone! my bf got too comfortable and decided to do the same I got beyond pissed off! Im usually comfortable...you know if he looks it didn't bother me what DID bother me were the comments "dude I would F@$& her" says my bf "I would totally F@&$ HER" to a woman that was bending over...Right infront of me.

While I was working he gives me a text saying "im going with my cousin to the store" I was fine with that! Until two days after I go to the same store and this cashier chick flirts with my bf right infront of me!!! I said right in front of him and the cashier chick "is this all that you and your cousin do when im not around flirt with girls??"

Btw this guy Is 20 idk when someone is in a relationship you should respect it ! I wanna do the cha cha dance step on his balls ! I hate his cousin.