My frnd is cheating me. she's saying me i trust you bt nt evn share her single secret and always bak stab me?

u only tell wat i shud do.. b'coz i don't think our frndship can remain for a longtym if evrything will go on lke this... she evn use me.. i mean wen she need my help she *** to me bt en she is happy she ignores.. specially wen she's with her boyfriend.. or his frnds..