How do I go about using his name?

Okay, so this may seem a little stupid and off hand, but the other day my boyfriend called me up on the fact that I don't use his name in spoken sentences when I am speaking to him. It kind of caught me off guard because I wasn't aware of this...it just seemed second nature to me because growing up I never heard my parents use each others names, so to me this is normal. But, in the whole it seems to annoy him as he seems to think I am not being overly personal. It's not that I can't say his name, because I can and I have, but it's just out of habit, and it's not just with his name...I just don't tend to use any ones name at all when I am speaking to them directly. I was just wondering if anyone had any tips on how to break the habit, because it's one that I've gotten used to over the 18 years of my life.