Last year, my bf went to a concert with his older sister and a few of her friends from work. Well he talked about this girl ashley that was there but i didnt think anything of it. This past christmas he admitted to me that he had a thing for her. i asked him if he wanted to be with her and he told me he was completely committed to me. So i didnt worry about it until about two weeks ago when he was showing me his call list on his cell phone because some number had called and he was curious if i knew it. i saw her name on his outgoing list. So after he left the room i looked at his outgoing, incoming, and missed calls lists and she was on there a lot. the call times were sometimes an hour or more. so i brought it to his attention and he tried to play it off but ended up telling me that he talks to her all the time on the phone and also on im. it hurts because i trust him and things in the past have made it hard to trust at all. now i find out that he has been talking to her all along and now i see myself as a fool. i talked to his sister about it because we are very close and she is shocked because this girl has tried to get really close since the concert and she never really thought about it when ashley would bring my bf up. but now she is also a little suspicious...is he cheating? help! because i dont know what to do. if he is, i want to know so i can get out of this relationship...i just cant believe how stupid i might have been. help!!!!