Should I try to get my crazy ex back?

oh kay so about a year ago I met this guy he was my friends b-f and he really liked me. so we went to the movies and made out. I know that is against the girl code or whatever but I don't know. but then she hated me (IDC!) then we went out for a longgg time and he did not talk to her for EVER! then when we were going out I told him to 3 way her in and made him ask her when that last time thay hung out was. and then 2 weeks later when I was snowboarding they hooked up. but I don't know if I should try to get him back or like let him go!!!...???/

let him go..not worth it