Lol! I guess that's called "throwing the baby out with the bathwater". In actual fact, we act and feel according to how how we perceive things.
If fasting does not change your perceptions, try exercise and healthy eating post fast. And a bit of sunshine.
In the UK, the National Health Service advise a healthy Diet exercise as a cure for depression. This is a state run service, that wants to save money. I would imagine in countries that charge for healthcare, they would recommend happy pills. I'll stick with the UK advice on this one :)
See how you feel about him after you get fit and healthy.