Listen to your friends! They obviously care about you, and are probably sick and tired of watching this guy play with your heart and then break it. Don't keep going back to him, he obviously has no respect for you if he's constantly hurting you. You deserve so much more than this guy, and your friends know that, that's why they are fighting so hard to get this guy out of your life. Kick him to the curb - you don't need guys like him in your life!