My friend and I both like this guy, but he likes me better???

My friend, Mia and I both like this guy Trent. We've both known him for about a year and a half. When I first met him, I didn't like him that way but Mia did. Now she still likes him and I do too. We were talking dirty on MSN for about an hour then he phoned me and we were on the phone for more than 3 hours. During the call, we were talking dirty and he was masturbating and said what he wanted to do to me. When I said I had to go, he said he loved me and that I made him have the best masturbation ever. I feel really bad becuase Mia likes him, but I want him now too. Any advice??