My husband ignores me at home and around others?

My husband works from home, and I am not working so I am at home for a majority of the day, also. I take care of the house and our toddler, and I am also pregnant with our second child. My husband is on the computer all day for his work, which of course I am understanding about. But when he is done working, all he does every single day is read stuff on the computer and talk on twitter, facebook, etc or play video games NON STOP all day. He will ignore me and our daughter for literally the entire day, every day. When we go out in public or to visit family, he also ignores me. For example, we were at his parents house this evening and he spent every minute of the evening talking to his brothers and his sisters boyfriend. He hardly ever even LOOKS at me, I feel like I'm not even there. I have been fighting against morning sickness and I didn't feel well for most of the night, but he just didn't care at any point of the night, he was just annoyed by me because I didn't feel well. I was literally crying at one point in the evening because I was watching my daughter and her cousin play together, and I got emotional thinking that my daughter and our new child will someday be playing together like that - It made me happy and I was crying by myself just watching them. He walked into the room, saw me crying, he had no idea what I was crying about or if I was happy or sad but he didn't bother to ask and was unfazed by it. He walked past me to go to the bathroom, I know he saw me crying because he was 5 feet away from me and we made eye contact. I feel desperately hurt and I don't know what to do. He is just extremely uncaring/unfazed by me, always. I have spoken to him about this many, many times in the past in a calm and mature way, he just always says things like I am the most important thing in the world to him and he'll make an effort to show me more, but literally nothing ever, ever changes. I feel like he is just lying to me, and really couldn't care less about me. I feel like we are hardly even married, he is in his technological world ALL DAY EVERY DAY by himself, just him and his video games, and I am alone and lonely constantly. Please help!