Alright, y’all... I need help, advice, I really don’t even know.

I am 31 weeks pregnant. My child’s father and I have had a very rocky relationship. We started out as friends we met through mutual friends and hit it off really well. He worked on the road for a construction company and traveled a lot... I was 100% faithful the whole time and through the “talking” phase but I am learning he wasn’t. When I found out I was pregnant him and I were not together but we both handled it rather well. I’m 21 and he’s 27. I slowly but surely started to see his true colors. He would and I’m sure still does belittle me to anyone and everyone. I caught him on Tinder numerous times but his excuse has always been, “I don’t even get on the app.” I am blinded by love I guess you could call it, I’m not really sure... He used and I’m sure he still does use illegal drugs, talks to numerous girls, and is not a good person. He has put me in more shitty situations than I would ever like to admit but for some reason I allow him to treat me like I just don’t matter... unless it is convenient for him. I recently just went and seen him where he is currently working and we slept together ONCE. He said he felt like he was “hurting the baby.” While I was visiting him I looked through his phone and he was buying pain pills from the lady at the front desk. I was furious. But believed his bullshit story. OH, not to mention... he downloaded Tinder again but this time it was my fault because we “got into an argument.” The other night he pissed me off so bad that I reacted out of anger and called the hotel and flipped shit. It really didn’t do me any good because the “manager” I thought I was speaking to was really the lady he was buying pain pills from and she told him I called and even recorded our conversation. Tonight, I got a Facebook message from a lady I do not know but she knows him because of the lady at the hotel. I am absolutely disgusted by the messages. Every time I “ignore” him I am just this awful person. I work TWO full time jobs. I am busy and when I am not working I am sleeping because I am exhausted. He continues to “pull me in” and I just don’t know how to be done. I feel like I only feel this way because I am lonely and we are about to have a baby. Please do not comment any negative comments because until you go through a relationship that is mentally, physically, and emotionally abusive you have NO clue how hard it truly is to get away. I’m lost. Sacred. Hurt. Confused. And feel worthless.