You have mutual friends. At a party at his house, you slept together. Now he wants you to leave. He is a very popular guy and every girl wants to be with him. But he never gets into a long-term relationship or sleeps with the same girl multiple times. His best friend is your brother. He's in college with you (he's a senior and you're a freshman). He and his group of friends have parties every Friday at his house (he lives with a few friends and you wait in the dorm).