How would you handle this situation?

I met a guy on tinder and he told me he was single and me and him began going out on dates and sleeping together, he was even living with me basically and met my son from a previous relationship. We were having sex everyday and I became pregnant, I’m expected to give birth to our daughter in July. Long story short he lied about being single and as soon as I confronted the girl I seen tag him in pictures on Facebook he became a different person, I have asked him about her before I reached out to her and he said she was a suicidal ex and crazy and couldn’t get over him. I was with him everyday day and night so it seemed to me he was single because what girlfriend wouldn’t have contact with her boyfriend on a 24 hour basis. and as I stated he was living with me. The reason I reached out was because I felt he was lying about his relation with her and i genuinely felt bad for her because he got another girl pregnant I think she had the right to know. Of course she took his side and it’s me who is the evil witch who fucked her man 😂. Ever since I confronted her on Facebook I have not seen him, he doesn’t reach out anymore, doesn’t ask me how me and his daughter are doing. I confronted her in December that’s the last day we had sex, the last day he was that nice guy and the last day I ever seen him. Yet he says he’s going to be in her life and even had the audacity to say “why” when I told him I didn’t want his girlfriend he lied about around our daughter. The reason for that is she was really nasty and I know she would never like my child, and I have read many stories about evil girlfriends doing stuff to a baby. I don’t trust her. He doesn’t want me to put him on child support yet I asked him about support and I seen today he left my message on read on Facebook messenger. Should I just call it a quits, file child support and move on with my life? Or should I try to co parent. He hasn’t at all been a support this entire time. Every appt, I go myself, I feel like this beautiful growing inside of me is fully my responsibility. I feel like I owe her everything. I get so sad sometimes because he was really a great guy, but after how he treated me I don’t ever want him again. I just don’t know how I should handle this.