<human>: I'm currently in a relationship, and honestly it's been so good. We've been together over 2 years now. But the problem is with my ex. I KNOW 100% that I would never get back together with him, he really was a nut job.

 For some reason though after all this time I still think about him. He was my first boyfriend, which I get no one ever really forgets, but my conscience feels so bad just thinking about him when I'm with some else currently. It's not like the thoughts are innapropriate or lustful, but more of what he's up to nowadays in life. It's kind of come to the point where I'll check his social media just to see what he's up to. 

What's going on with my head? Any tips on how I can finally stop this?

Can you give me the gist of the text in a nutshell?
<bot>: in a relationship now but still think about ex regularly, not in a lustful way just wondering what he's up to these days. How do I stop?