I hate being pregnant

I didn't want to be pregnant. I've just accepted it at this point. My ex left when I was 8 weeks. I don't have a support system. He is literally the biggest regret of my life. I'm 25 weeks and I feel so bad for thinking like this. I want to keep him because I truly do love my son but it's so hard and I'm so tired of life right now. Everytime I try to better myself or move forward I get knocked so far back.