Does she like me or is she just messin with my head?

ok so i 've known this girl for about two years although we didn't actually start hanging out till this year. we started to hang out will we were in drama and we were basically forced to be together cause of our parts but like a week or two after we were stuck together she started hug me and refuse to let go which to be honest i didn't mind but then after that every time she saw me she would kiss me on my cheeks and she would hold my hand and sit on my lap and refuse to leave my side and now dramas over and she still wont leave my side she says im her lover she even wrote it on my splint and on my 16 b-day last week she mentioned the fact thats im leagally old enough now to have and she "offered" to be my first i didn't even know what to say.some times shes like ur my best friend your like a sister to me which really confuses me so does she like me or is she just messin with my head