<human>: excuse grammar. On my phone.

At first it was fun: we met in class, i developed a crush on him, we'd sit together, we ended up kissing and then I really startes getting feelings.

We slept together, and now my mind wont stop chasing after him. There are some things that are deal-killers for me that make me not want to date/ be involved with him romantically anymore.

But i find myself obessesively thinking about things he's said to me, or what he's up to, or when he's going to show up for class. Sometimes i cant study or think straight because im analyzing all the things that happened between us.

I need this to stop but i cant cut him out of my life completely because i see him too often.

Can you condense the text into three sentences or less?
<bot>: how do you stop thinking about someone and move on with your life, when you know theyre no good for you?