Girl I like rubs boyfriend in my face?

Ok, so about 2 months ago, i had a cl with her. we got to be REALLY close friends, but she had a boyfriend. we have this really weird schedule for school, we get diffrent cles every quarter. anyhoo, she broke up with her boyfriend, and was a mess for about a week. i did what i could do to comfort her. then, the quarter ended. now, i only get to see her durring ping period once, (or if im lucky) twice a day. also, we have the same lunch, but we dont hang out together. she used to act real into me, up untill around Valentine's day, when she got a new boyfriend (so um, i see why shes not too into me anymore). now, shes completely ignoring me. i feel lucky to get a "hi" from her anymore. about 3 days ago, se started showing off her boyfriend, and rubbung him in my face a little. im not angry, just,disappointedd in her, that she would do such a thing. she knows where i hang out, and she'll show up, like, 50 feet away, with her boyfriend, and start making out with him. why would she be doing that? is it to give me the subliminal middle finger, or to make me jealous, and have me make m move when she breaks up? i hate trying to understand the female mind. its too complecated for me. lol...