This is only my experience, so take what follows for what it's worth (not much).

I have been in the same situation as your partner (though I had sex with my partner more ofte, but still way less than before medication).

Simply put, I was ashamed of my low libido and not in a good headspace even with my medication( which was supposed to help).

I was so ashamed that I didn't want to initiate sex with my partner. It was not rational, but that is how I felt at the time. And I would sometime watch porn so that I could get the dopamine I would get from sex, without the shame.

I know it won't make you feel better, but hopefully you can have a different perspective on how your partner might feel and get, hopefully, a new track to find a solution to your problems.

Also, there are some medications that can help with libido (Wellbutrin if I remember correctly). Might be worth it for your partner to check with his doctor.

Porn will kill a guys attraction to normal looking women. I have no idea why people act like its a good thing to watch it.

It literally trains your brain to constantly need more dopamine. So sure, maybe now its soft stuff, but that will not be enough in six months. Thats how it works.

"Yeah, thanks for rubbing it in Doc..."

Edging is the worst

I had a couple of ADHD pills that made it painful when I came. After trying a few, I found a good one and my cums are normal now.

Just try different pills until you find one that works for you.

ahh yes, "just be happy" logic.

sometimes the depression is so heavy that the only thoughts one has is to end it all because the pain is so unbearable.

imagine losing a limb and the pain is so great that no matter the amount or strength of pain killers you take, the pain won't stop.

but yeah, totally worth it to experience that just so you can rock out with your cock out.

And sex isn’t the only side effect. There are plenty.

I dropped my meds cold turkey when that happened like a decade ago,

that shit is fucked up man, "the zaps" for coming off anti-deps are a month+ long pain.

Some types of antidepressants have a very common side effect where they massively reduce (sometimes to the point of completely eliminating) your sex drive. It's a really shitty tradeoff.