Why do I think I'm happier? I am, this is my life and I enjoy everyday. In the past I wasn't happy, I was miserable. Why? Doesn't matter, what does is that I never want to feel that again. So I strive for a better life, a better way of living MY life and where I am right now is where I want to be.
I know everyone's situation is different by all means. I don't expect everyone to understand because of this, but life is what you make of it, regardless.