By MELANIE STONE Dear Melanie, So I like this guy a lot but he’s cheating on his girlfriend with me. I keep telling myself that when he leaves her (he says he will) he won’t do the same to me....

By MELANIE STONE Dear Melanie, So, I have been good friends with this guy for a while, and lately we have been getting really close. He used to like me a while back, but I did not have the same feelings,...