He laughed in your face when you were crying, he messed around with other girls, and he had gotten sex from you, while also looking
to get with his
ex. Not exactly the best past
to look back at. If you want
to break up with him, then you will have to be straight with him and tell him it is over. Then make yourself busy. Plan to hang out with friends a lot, focus a lot in school, get involved in clubs or groups in school, and just make sure you stay busy with things you enjoy.