Congratulations, James. That really showed him. "I just don't get depressed." "NOW YOU TRY IT!"
The best thing for depression is to diagnose what is making you depressed, why it's making you depressed, then try to forget about that thing or resolve it within your mind, then go have some fun or have some fun to forget the depressing thing, whatever you want.
Go out, kiss a girl (or another male, whatever works for you), drink a tropical fruit drink, buy a colourful shirt, get a hobby perhaps such as chemistry (make your own explosives) or astronomy. Anything you want (and can afford).