Happiness does not come from external things as we're really taught as children. It doesn't come from Santa Claus. Happiness is from within your mind. Just realizing that will change your whole life.
I do have the ability to explore life and to be over the moon at the smallest thing - a few pints and a craic in the pub and I'm in heaven. But I have a melancholy side to me as well. Acting allows me to feel things, it kind of buys me human experience. And I don't mean this as acting as higher cause, because it's not, but it does kind of have a higher awareness emotionally.