Breaking Up During Pregnancy💔

So... I messed up a lot... When I was with my fiance I never felt enough in my relationship. I was so insecure.... I ended up cheating... IDK why I did... I was not a good gf to my fiance at all. I just felt if other people found me attractive I could feel better about myself. I eventually stopped cheating... But about 4 months after I stopped, my Fiance out. He had found my old Craigslist page I had made. He was pissed and we fought. I apologized and promised I would never do it again. We decided to try to fix our relationship... Well it all fell to pieces when he came home one day. He was gone all day. He sat me down and said we needed to talk. He told me he wanted to get tested since I had cheated on him with so many people.... He said he tested positive for HIV. My heart was pounding and I couldn't believe it... I felt awful... He told me I better get tested so I can start medication.... I told him I was so sorry, but he said he can't do this... He thought he could move on, but he this was just too much, and there's too much hurt. I begged him, but he left that night. I still have no idea who gave it to me. I still feel awful. After being tested at my doctors office (Positive of course) I also found out I was pregnant. (it is his. I hadn't been with anyone else for 4 months). I told him and he does want a paternity test, which I can understand. He said if it's his he will be there, but it doesn't change anything. It's been quite a while since I found out. I am now five months and he has been bringing me my every craving. Has been on my beckon call. But every time I mention getting back together he says there is too much hurt. The doctors are taking extra measures with this pregnancy because of the Corona virus... And me having HIV... I found out he had started seeing someone and my heart is broken. From what I know it's nothing serious, but she is so much prettier than me and I'm so broken. I want him back, but he's made it clear there's too much pain to go back. I wish I could get him back ... I want to rewind and fix this all... I feel so hopeless. The girl he's "seeing" is also so nice... She's brought me food when she was with him. She's perfect in every way I'm not... I want to move on but he is the one. I just can't...