Boy problem. Please help. ?

So me and this guy have been talking for 6 months now. But he'd throw in my face how he'd flirt with girls and that he liked 2 other girls while we were talking. Recently I've started crushing on my guy friend something meaningless. I see him no more than a friend. So I told the guy I've been talking to and he says it makes me unfaithful since we were talking and I started liking somebody else. Can somebody give me advice. He made me admit to me liking my friend. And the thing between me and my friend is nothing. I think he's cute and he cheers me up when I'm sad over this guy but I don't see him as anything else. And the guy I've been talking to I really do like him and I've told him countless times how much I do. I've told him how the thing between me and my friend is nothing. And he doesn't believe me and now he puts the Blame on me saying I ****** up everything between us by liking another guy. And the only way I can fix anything is by doing something with my ex. And I'm not some type of whore that goes around and I won't do it. And I seem to can't move on with this guy. I cry countless times to him begging and crap. Somebody please give me advice I need it all. I just need help.