Any advice would help!

Sorry its a bit of a ramble. So to give some context. I (f23) and my ex fiance (m24) broke up just over 2 months ago. Well not a breakup. I was dumped. Our son was 10 months old at the time. It came completely out of the blue for myself. He packed up and left that night. I was completely distraught. I still am tbh. It started off with him saying he wasn't happy anymore, and he needed time to work on himself and I needed too as well. He said he loved me and that wasn't the reason. During the next 2 months. Hes on tinder, now says he doesnt love me anymore and thats it its over. I am so completely destroyed, being left 10 months pp to the man I was going to marry. I love him so desperately, and now have to work out co parenting with him is so draining and heart breaking. he doenst want to speak to me. Just the parenting. We were best friends and in love. Ir so i thought. Now with some time and clarity and space, ive done some reflecting. We were both not perfect, we both had flaws. I just always thought we would go through anything together and grow and change together .I myself since then had to pull myself out of the depths of post partum depression/anxiety almost psychosis honestly, i went absolutely batshit. I realise that, i was solo parenting almost the whole time and exclusively breastfeeding, I didn't even realise how much I was suffering until I had no choice but to stare it in the face after he dumped me. And now im left feeling even more heartbroken that I was dumped in the trenches of motherhood. I know I cant make him love me and if he wasn't happy, he shouldn't stay. He says he wasn't happy and he doesnt love me.

I guess im asking. How on earth to I begin to stop daydreaming hes going to come back and realise he loves me ( when I know he doesnt) and work on it and give us a real chance. I always believed we loved each other and will love each other forever. He moved on so quickly and I feel like nothing. He can barely be around me with our child. He just takes him and leaves and drops him off. He looked at me with nothing but almost hatred or disinterest. Im so heartbroken. He moved 2 hours away for work so I have our son full time and sees him on his days off. But im struggling knowing that the fantasy of him coming back to me won't happen. He doesnt love me. He doesnt want to marry me and he doesnt want to fix this. I believe we can but hes do against it. I still think so highly of him? Even now. Is that just my love and hope, but i do think hes wonderful. Idk .

How do you accept it? Do they ever regret it? Was it real love? Can people actually grow and heal and come back? Im sorry its a lot, its so hard because I have to see him for the rest of my life.a