My girlfriend said she needs a break........

Im in a similar situation, girlfriend set me up on msn with one of her friends, and i made the mistake of talking to her, ive seen her since n she said she wouldnt talk about it n she forgived me. now she has been playin mind games for the last 2 months and has gone away, even though we are in a long distance relationship anyway, to THINK to sort things out, she promised me she wasnt gonna break up, but her phone is off n im worried she might cheat on me, or never turn her phone back on/dump me.