May not be looking for help but looking for understanding. You mention he doesn't like his job. Have you thanked him for staying at his job, providing for the family, offering a financially stable home? So many people up and quit their jobs the minute they are unhappy with them. No, it won't make him like it but it will make him feel appreciated. How you asked him about getting help (and when) might yield different results. I'm on medication myself. If my ex had come to me, maybe as we are laying in bed together or during a relaxing moment and said "I'm worried about you. I love you very much. I think your health might be in jepordy. Let's go together and make sure you aren't suffering from depression. I'll stand by you regardless of the outcome."
My therapist mentioned that talking about suicide isn't a bad thing necessarily unless you are imagining yourself dead.
It may be that right now he needs empathy, not sympathy.
-------------------- Damn it's good to laugh again.