Advice?? kids and falling out of love

My husband and I have been married for 2 years and have been together for 6. We have a beautiful almost 2 year old daughter. The last few years I've been struggling to stay in the relationship. I for married thinking it was probably a bad idea (dont recommend). I wanted us to be together for the sake of our family (I know, i know. That never works) but our daughter and us are all extremely close. Our jobs allow us to mostly be stay at home parents and she is used to us being together all the time with consistent time with him and then consistent time with me. We have a lot of history as well, it would be hard to end it. He is a great dad, but as a husband he struggles to communicate and think about me. We are young, 21. I know it's a lot for him to be this great husband and father this early. But he doesnt really treat me the way I want to be treated. Hes rude to me a lot and makes me feel bad about myself. He snaps at me and I often feel unloved and ignored emotionally by him. However, when I say that we should just separate he freaks out, cries, and begs me to stay. He just never puts in effort, I used to think it was just different love languages or something. But I literally would spell out exactly ways i think he could try to communicate better (he tells me i have to tell him how because he doesnt know) and then he would ignore everything I say and do the opposite. I'm trying to give him slack because I know he feels a lot of stress and pressure to be who he is if that makes sense. But I feel like I'm falling out of love with him. I think it's already happened. Im sick of the empty promises that he would try to treat me nicer. The only reason I'm with him I feel like is because I want my future children to have the same father and like I said, it would be hard on my daughter. I love being a mom and I want another child now. I want our kids to be close in age. Hes not ready. Which he has every right to feel that way, but I am guilty of being bitter about it. I know it's not fair and I'm being controlling. I know having another child would NOT fix our relationship or make it any easier, so I honestly don't know why I have such crippling baby fever. I dont know. I'm sorry this is so long.

I dont want to have to end this but I feel like we are totally different people. I try to tell him I dont want to have to change him in order to be with him if it's just who he is to act like that. HE deserves someone that he doesnt have to change for. But he refuses to even think about separating. Does anyone have any advice??