feeling distant

I feel so distant from my BF of 7 years. We've been living together for almost 2 years and have two beautiful children together and one on the way. But I just feel as if we are just together for nothing. He makes comments that he never wanted kids, that he never wanted to move out. We never talk and when we do it always seems like an argument results from it. I'm a very talkative and touchy person. I love the comfort of having someone to talk to and to share intimate moments without having to have sex. Sex isn't important to me, it's not a need. But my boyfriend only shows me attention when he wants to have sex and touches on me. But I'm thoroughly disgusted with it. I love him, I know I do but idk if we need to be in a relationship anymore. He even makes the comment that he's trying to "do the right thing" by being with me. He doesn't even want to get married. I just feel ashamed and saddened because now I feel like I wasted my time and gave this man three children and 7 years of my life. And he doesn't care.