I'm so sorry about your friend, Depressed-Fiance Yes, I definitely believe it can be relate to mental health, especially depression. However, the only way to know is to go to a doctor and see how it goes from there. I'd suggest to give this advice to your friend. Hopefully he will listen to you, it can be hard in that state of mind. Just do your best, but don't be too hard on yourself: remember that he's the one that has to do the work. Sending many hugs to you and your friend