What do i do with my relationship ?

ok so me(16year old) and my gf(16 year old) are separated because we are on vacations and today in the morning some guy added her on facebook and well i hate when guys add her but i didnt make a big deal... she then started to say all this crap that i told her that she could add whoever she wants blahblah and welll then i was like WTF i never said that (i never said that to her) so here is the thing she dosnt let me add any girl and she says she lets me but every time a girl adds me she freaking delete her or makes a BIG deal and well i know shes prettier than the average girl and well i know that most of the guys would love to f**k with her and hook up because she has a nice body and she looks older (in a sexy way,not gettho, shes a prep) but i know for sure shes loyal to me weve been going out for 10 months an well theyve been the best 10 months untill the vacations i dont know wtf got into her that she is ALWAYS with her friends most girls and well shes been hanging out with them for the las 2 or 3 weeks... the only way we can talk is skype and she prefers to be with her friends....than talk to me but she was never like that when we were back where we live and ive try to tell her that we need to talk because we need to be like somehow in touch and all she says is well i havnt spend time with my friends and family and i wanna spend time with them ---me in my mind--- [WTF youve been every fuc*ing day the pas 3 weeks with them OMG] but i was like ok because i try not to get mad at her and well at this point im pissed because all this happend in the morning and she never replied to my message that i sent her and well i know that all this sounds stupid but shes making sh*t up and this is the secont time that happend in this week and well it seems that she dosnt cares because she went out with her friends and and just went on with life like it doent matter (and ive been having th woerst fkning day and she still out with her friens and its 3AM!!! WTF!!! please help me out and well tell me what to do or what to tell her or idk any suggestions?