What makes me happy? Hmm. It's all attitude, baby! I am an eternal optimist.
I saw somewhere yesterday that Happiness is having a bad memory... which it certainly is in my case. I call myself Blissfully Ignorant.

I see the good side of everything where possible.. and I don't let the turkeys get me down. Never let anyone Steal your Joy. I eliminate negative energy, including people, from my life. I relax, I have fun, I love my job and the people who work here, and um.. and I'm ultimately happy

I don't know what else to tell you, except maybe to enjoy what you have and try not to let the "what ifs" get to you.