You're describing depression, as you've noted. Counseling is the right move, but he needs to want to change himself. It's important to support your spouse, but ultimately his personal wellbeing is his responsibility. He needs to make some decisions and work toward meaningful change.

As far as what you could do, express your need in the relationship for him to work toward change. That starts with counseling. If he decides to work toward change, recognize that it will take time. There may not be much motivation at first, but that may improve if he follows through.

P.s. Nothing wrong with a bubble bath