I was in your same situation. I ended up dating my real good friend's ex this summer. Sure he was pissed, but I didn't give a rat's ass. When it comes to girls, I could care less what my friends think. You gotta do what you gotta do!
There was a group of girls at my old HS known as the FFF girls, Find em, **** em, Forget em. They would do that to us, the guys, I felt so cheap, but I never complained.