am I just over emotional or do I have a reason

me and my so have been together 10 years. And have a 3 year old son, and another baby on the way. He is a good man works, comes home, supports us doesn't call me names anything... But there is one problem, and it's a major issue to me.. He has zero emotions and shows zero affection. He never says anything nice to me like beautiful or anything that would boost me up, never even makes an effort to sit on the same couch as me, hold my hand... nothing.. But he says he's happy. But for the whole 10 years he's been this way and it's something I've always struggled with. He says he doesn't know how to be affectionate. I am someone who needs to be reasurred and know someone is happy. I don't like guessing and asking and wondering. It's so hard being with someone and not getting that. And I know he will never change because it's been 10 years and the same fight and same outcome. what do you guys think? could this be a deal breaker for you, or am I just overly sensitive?