4 years in a relationship with baby daddy but he won't marry me

I've been with my baby daddy for 4 years now. He proposed to me 2 years ago, before I got pregnant. Our relationship is registered as well. However, in recent interactions, it came to light that he didn't want to get married. I don't know what to feel. I left my ex due to the same reason. And now I feel like I'm back in the same situation. The saddest part is, this time around, I have a toddler. I want to leave because the first time I met him, I told him I want marriage. I didn't hide it. And now he tells me he doesn't want one. I don't know what to do......