Depression side effects for partners

My other half suffers from depression, and has done since I have known him.
When we first met he was not on any medication, but as soon as he went on it his sex drive decreased dramatically. Years later we only have sex when he feels like it, which can be up to 4 months in between drinks.
I try really hard to not put extra pressure on it, so I say nothing until I feel like I am climbing the walls, and I try to talk about it contructively, but it usually ends in an argument and then he says the last thing he wants to do is come near me.
The rational side of me understands that it is nothing to do with me, but I miss the intimate moments, the hugging and kissing, and I miss him making me orgasm.
He has seen his pscyhologist and has tried different medications, which is SUCH a hard process because he has to ween off the first medication and onto a new one, so he is irritated, angry, horrid to be around whilst he transitions...then if it doesnt work, we go through it alllll over again...it is not healthy for our kids, or either of us, but I feel like I am stuck.
We have discussed me going outside for play time, but I dont want to do that. I want my amazing husband to desire me and make love to me, I dont just want to go and f@#k someone else.

I feel so alone, I dont want to talk to my friends because I feel like we have done everything we can for now to resolve it, and I dont want to be a broken record.

Is there anyone else out there who is in a similar position?