Has anyone went through this and how did it end

I need advice..

Hi! I am a mom of a 7 month old boy. I am engaged, I got engaged before I got pregnant we decided to put the wedding off and not rush things because of how bad we were fighting when I was pregnant. Well, things have been changing.. We fight a lot because he isn't very mature. He has alot of growing up to do. When it comes to helping me with our son. He will do as little as possible. He needs a diaper change, oh he is hungry. I'll do something just after I am done with my VIDEO GAME. We fight about that, because his kids NEEDS should come before his selfish wants. He never helps clean until these past few days and he complains to me about how he does stuff, but no one realizes it. Because we don't tell him good job.. or whatever. But he isn't a kid, these are things you just do because they are a part of life. No body tells me good job everytime I clean the house. He acts like a child. And he is lazy. I am becoming unattracted to him. We have been together for about 3 years... and now we have a family together. I am trying to be patient and I praying somehow work through this. I just don't know.. also I am never in the mood anymore. But it is only because I am not attracted to him anymore. I love him and care about him. And if we separate it is going to hurt me too... I want to work through it, but I don't know if I will ever feel like I used to about him.