Yeah, I can echo much of what has been written above. The quote Friday has posted above hits the nail on the head, for me. Intimacy (sexual and otherwise) is so important in romantic relationships - understanding intellectually what the cause is, only gets you so far. It is a basic need in a relationship.
I'm interested to know WHY your partner thinks meds are a waste of time. Is that what he's heard from other vets? Has he tried them previously? What I'm getting at is, has he formed this opinion on the basis of what he considers to be solid evidence? If not, is it possible to gently challenge that viewpoint?
Having said that, having your guy start taking meds is unlikely to solve the intimacy problem in the short term! For my guy, even when he's in the mood, his meds sometimes make it difficult to 'reach the promised land', if you get my meaning ;). Not to mention all the other stuff going on that means we sometimes don't fool around at all for a week or two at times.
Intimacy is very important, but sex is only part of intimacy. How about kissing, cuddling, holding hands, touching each other in a non-sexual way? Is your guy okay with doing that kind of thing. I find that, even when sex is off the cards, my intimacy needs are met in other, non-sexual ways. Just holding each other in bed makes me feel loved and wanted.
Hugs and best of luck.