Is he getting help for the depression? I am a mental health professional and he'll want to avoid specific antidepressants as they are libido killers (SSRIs.) There are others that can help with his mood without disturbing his man part. (SnRIs) CBT for depression is a med free option as well. Men tend to do better with CBT as it's not digging into emotions but rather a manualized, step-by-step, concrete means of recovering.
M 10yrs T 13yrs BD #1Oct 2015-PA between WAH and COW BD #2 April 2016-WH resumed PA, she broke it off Jan 2 2017 WH says he wants divorce April '17-Letting go 2018 D busted DD8, DS6, DS3