So 3years ago my bf and I separated for like 1 month if so long because I just felt stifled in the relationship. So within that supposedly short space of time, he started talking to this girl from work. I had no idea about this and I still don't fully know the time table of their friendship. When we got back together I went on his computer just to browse some forums as I left my laptop at home. Upon opening it, he had his photo gallery opened and I saw snapchat pics between them and also this very long love letter thanking her for being so awesome in a nutshell. When I found it I flipped out and he had to leave work early. He said he was bored and he really had no feelings for her because I was the only one he wanted. 

We did not get back together right away because for some reason I just felt he was lying. If it was nothing he had a whole 3 months to tell me and he didn't. He said no time was the right time.

Fast forward a couple months later, I saw he was checking up on her on social media. I stressed that I didn't appreciate what he was doing and it really made think he was lying to me again about not having feelings. He said he wouldn't do it again and I left it as that.

Now Monday of this week, he came across a post I made on a forum about a crush. It was a tarot reading thing and I just posted in it for shits and giggles but it wasn't anything serious. I posted a letter of my fake crush and he THOUGHT I was talking about this guy who liked me during the period we were broken up for. The guy and I had nothing but he always assumed something happened. The guy lives in NY and I live far across the globe. 

So I told him I knew he still looked up the girl and I actually didn't. I pretended I did because for some reason he has been moving kinda weird with me. You know if someone is guilty they try to project things on to you? Well turns out he is still looking her up and when I asked him he said he was bored, again. I told him it was entirely disrespectful for him to keep doing that even when I greatly expressed that it was very suspicious and makes me uncomfortable.

He still saw nothing was wrong so I broke up with him. It's been a week and he has not reached out or contacted me. Am I the asshole for breaking up?