How can we fix this relationship

I've been dating my boyfriend exclusively for almost 3 years. I have 3 children, he has 1. We moved in together 6 months ago. The problem is, as much as I want to be with him, since we moved in together, we're not happy anymore. He doesn't want to get married (I do) and he never expresses love for me. He's not mean or abusive, just emotionless. I just don't understand how someone says they love you but doesn't show it. He doesn't seem to understand why I'm not happy and I don't know what do do. I want to make it work, but I don't know where to start. Help!!

Maybe he feels overwhelmed and unsure after moving in I mean once he seen the reality of day to day living with you and the kids he may be questioning the decision he made to move in together ( you didn't say whether or not kids live with you so I'm just assuming they do) you mentioned you were happy before the move did you guys ever talk about marriage before the move ? Was he really more loving before or did you expect things to change after he moved in ? Here's the thing he has to aknowledge your feelings whether he thinks they are grounded in truth or not that would be a start he also has to be willing to work on the relationship in order for it to work not sure this helps I just can't see how. It will work if he doesn't even try to understand that you are unhappy for any relationship it takes both partners to be on board and grow together can't work on it on your own maybe you can write him a detailed letter explaining how you feel that may open his mind enough so you two can have this much needed discussion.

They say the greater the knowledge you have about something, the greater the love. So even if you have been dating for three years, it doesn't seem like he's really gotten to know you. I know that just doesn't sound right, but you yourself wrote: "he doesn't seem to understand why I'm not happy..." Also if you love somebody you care and you understand. How can one love someone you don't understand? He doesn't want to get married and doesn't understand you - back up to the point prior to the move in, and then take a good look.