Incest

Angel
My boyfriend has this bitch cousin which he just known for like 5 months. They arent even close but the girl keeps on comenting on my boyfriends picture telling him his handsome. This happened on facebook. I added her so she could notice me. 3 mins later she messaged me and asked things like, is he really your bf? And told me that he is his ideal man, like if she wiil have a boyfriend she wants a boyfriend like mine. She is really acting like a bitch with her other questions and I am so pissed off. I am not just over reacting. My friends told me that there is really something fishy going on for they have read the conversation. Hey havent experienced such thing so they dont know what I should do, but theyre very supportive as I talk to the girl. Anyone who can relate with me? Ohmygaaash i dont know what to do.