My fiance and his baby mother

So, I just found out that I’m 5 weeks pregnant. I also just found out that my fiancé and his baby mother has been sleeping together for the last 2 weeks. I feel like a psycho because I’m not mad or hurt like idgaf and I want him to leave my house. We have been having issues. One incident he called me an “asshole” and told me I need to learn how to shut my mouth I don’t always have to be so honest. I let that go. Also, I went through a dry spell that I was not interested in sex at all and he acted as if he was cool with it even though I explained to him that it had nothing to do with him. I thought he understood but then every chance he got he would make a remark like, “everyone is getting laid but me” or “are you ready to fuck yet” and just disrespectful things of that nature. Before we got together I made it clear that I have these spells where I have 0 sex drive. He made it about himself of course and said I made him feel like I didn’t want to be with him. I explained it one more time and prayed he understood. Well the next day I was trying to sleep and he literally started kissing and rubbing on me and I was so fed up that I gave him some “here you can have it” sex just so he could leave me alone. He noticed that something was wrong. I wasn’t moaning or anything just laying there until it was over and then I got up and showered. Our relationship went down from that point. He would take it personally when I would say I didn’t want to have sex right now and start an argument. He asked me if I liked sucking dick and I was like yeaaahhh and he was like everyone’s dick but mine 😳 I was like oh. He realized he fucked up and got dressed and left for work. Sent me a long message apologizing. That was the final straw and we kind of went downhill from there. He’s super clingy and got mad at me because I spent the weekend with my mom and not him so he purposely started an argument. So the day we had that argument he went to work “early” found out he had been fucking his baby mom the same one who he talked about so badly and said she smelled and never cleaned her ass. How I found out is he stayed out this past weekend and didn’t come home at all. I was okay with it because he had been drinking and was about 45 minutes away. He liked and told me he stayed at a friends house hut when he wouldn’t answer I texted his friend and he said he had been left an hour ago. Logged into his Facebook and there the messages were. He tried to lie his way out of it but I was at the point that idgaf. He tried to say we are having a baby and need to stick together and I disagree. I can’t kick him out because we share a lease me being the main applicant so I’ve been staying at my moms house. I let him come to the ultrasound today

I brought my cousin so he wouldn’t harass me. He has been texting me non-stop and won’t stop. I spoke to my leasing manager and they are removing him from the lease and then he has 30 days to move out. Just frustrated and needed to vent.