Something missing?

I’m not sure if I’m crazy or what but sometimes relationships are confusing. When I lived at home with my family, I never expected any of them to come in my room and hang out with me, or to sit and watch movies with me. Hell, sometimes I didn’t even talk to my family and we lived in the same house. Now that me and my boyfriend have been living together for a year, I’m not sure what to expect. When he is in the other room playing video games I actually feel alone and like he doesn’t care about me because he isn’t with me. It’s like I’ll be at work all day and come home and he’ll be doing his own thing and for some reason I get upset cause I want us to be together. Idk it makes me think something is missing or somethings not right