My friend is a ?

i have a friend i have been like almost bff with since 4th grade. but over last summer, she got super freaky and cut her hair REALLY short and dyed it black and started wearing creepy goth stuff (and not CUTE goth stuff either, really ugly crappy stuff) she looks awful, plus she acts all different and ignores me, swears a lot (to teachers!) and likes...a girl? one of her other friends told me she is really concerned about her cause at a party she and this other girl have become like best friends (or more?!?!) and were doing belly shots off each other and started making out. what it UP with her? maybe she was just drunk? P.S. We are 14 YEARS OLD. 14, for cryin out loud!