6 months pregnant with 2 kids already and I believe my relationship is not gonna resolve the issues it has. I’m scared and I feel so vulnerable & alone it’s horrible

Me and my partner have been together on and off for half a decade. I’m pregnant with my 2nd biological child to him. Fair to say we have had the worst year this relationship has seen. Mostly because of him due to cheating on me. But I go back with him and god pregnant almost straight away with this baby. I cannot get over the fact he’s cheated and it’s destroyed a massive part of my love for him ( I still love him) but it’s just not the same anymore. It’s more heartbreak. I’ve tried to over look everything cause he said he will change snd things will improve but I’m done with believing it. He’s not the man I fell in love with 😭 & that’s what kills me. I see him every day and don’t recognise him but pine for the man I once had in my life. We live separately thank god as I live in a mother and baby unit and he has his own place. I’ve ended the relationship as I don’t know how much more I can take of feeling like this anymore, but he usually fights for us and shows me he wants this no matter how many times I say it’s done. This time. Nothing. He seems like he cannot be bothered, he doesn’t want to message me, he’s not attempting to have a conversation with me really, he’s not attempting to hug me or anything. & I’ve never felt more abandoned in my life. I’m sick of feeling like this but loving someone so much. 😭 I do not need judgement on this. If anything nasty is put I will just delete the comment I don’t come on here for that. I just want some insight or if anyone has been through a similar thing x