Hi blueberries and cream,
I'd also like to point out that it sounds like you are a wonderful partner and your partner is very lucky to have you by his side.
I went through something similar with my bf, when he was feeling suicidal. I managed to convince him that he is worth the help, and that what he is feeling is normal, and mental health issues are treatable, and that absolutely no job is worth dying for. I told my partner to quit his job because it is not worth him being so miserable about it. No job is worth their life.
I feel very similar to you in that some days I cant be bothered. But I offered to make the GP appointment for him, and attend with him, which I did. This has lead to him seeking counselling with a psychologist and a psychiatrist. Its still feeling like a never ending road but at least I can see hes trying?
just wanted to let you know you arent alone in what your experiencing. Carers fatigue and being sick of having to fix a grown man/woman's problems for them is truly exhausting.
I hope your partner ends up seeking help.