Same here, My hubby and I are always saying I love you to each other, doesn't make it any less special for us and we've been together 10 years and married for nearly 8yrs.
I dunno whether the fact he has health problems and there was one time, early on in our marriage when things didn't look too good for him I think the sudden reality of life made us value each other more, I know it certainly made us very close, which at the time I didn't think was possible.
I don't think it matters how often you say it, so long as you mean it, both respect each other and treat each other well that can mean more than words :o)