Fizzyo — I actually have known contentment (I'm content right now!) and that's basically my depressive's version of happiness. It's the closest I've gotten to it. "Happiness" to me is just the absence of my depression; it's not a separate emotion of its own for me.

MarleyCat — Yes, I can relate. However, I can laugh at things and have fun, but that to me isn't happiness, it's just reaction to stimuli. Joke = laughter. Tickling = laughter. Happiness can happen internally and it doesn't always need a trigger. It's the same for depression. Some people just wake up happy and I've never felt that. Content? Yes. Happy? No.

I feel like I've gone my whole life only seeing various shades of black and white as red, blue, purple, green, etc... and now I'm just realizing that that is not what those colors look like to everyone else.