Your DH sounds like a peach. My son is an IT guy, I can totally see him doing what your husband does, it's the nature of the beast.
My DH and I have been married for 36 years. We're very different, I kid people about it saying that the fact we're both still alive is a testimony to our restraint over the years. But the fact is, we love, and like, each other even though we don't shower I love yous, or gifts, or cards, or whatever on each other.
I read an article once about how to tell if your partner really loves you. It stated it's the considerate things your partner does. Do they put your needs above their own. When they go get a cup of coffee, do they ask if you want one too. Do they offer to go get dinner if you're too tired to cook. Do they call you when they're out to see if they can pick up anything for you on their way home. Do they ask you if you need anything before they leave the house. If you need them, do they set aside their plans to be there for you. That pretty much describes my relationship with my DH, it's not what we say, or how we say it, it's what we do.