Oh Nancy, I'm so sorry to hear about your friend.
I was the primary caregiver for the last year for a friend (we were never lovers) who dies of AIDS in 1991. What hurt him most is that most people in our circle of friends "disappeared" after he got really sick.
I mention this because your attention, love, and caring is very important to your friend, I'm sure. You already know this, but I wanted to reinforce the point just the same. My friend, Roland Green, had time enough to make peace with himself and his family and the fact that he was dying. In his heart, I think he even forgave the "friends" who abandoned him before the end (something I still haven't been able to do).
In any case, I'm SURE your visits are a source of strength and love for your friend, and I'm SURE he's very grateful, whether or not he's the kind of man who can express it verbally.
Hang in there, my dear!