Most Helpful Guy
I don't think you're unfair, it sounds like you're second to his family. A relationship can't grow and I'm not sure he wants it to. Look this is simple, when I moved out and got my own place. My girlfriend/future ex wife moved in. From that point on she's #1, and there were times I had to say no to my family. They understood. I think you know where this is going. GOOD LUCK!!
Most Helpful Girl
You have the right to be upset. You've been dating for awhile and he should definitely prioritize you more than he does. I'd say have a serious conversation with him about this in person and if he can't make time in his life for you, move on.