advice on this guy?

I'm thinking of hooking back up with my ex.. I know that sounds like a horrifically stupid idea.. it's just I still can't get him out of my head different things I see or listen to some of my music I think of him. It's been almost 3 months since the last time we slept together (we were fwb) after that we havnt really hung out except for like having coffee for like 15 minutes before class. It's almost been a year since I lost my virginity to him... I just want to get over him but some how I still care and think about him.. any advice? (It used to be we were together - then it was to Fwb.. I know I shouldn't of agreed but it was like I was addicted to him. He made me happy whenever I was around him I loved hanging out with him.. and I havnt slept with anyone else. Only him. It felt like he made me addicted to him  and sometimes I wonder if he knows that..