I take responsibility for my own happiness. I know that no one else can "make" me happy. Being able to make my own decisions, look at situations and determine what's wrong, if anything, working toward goals that I set for myself - all of these things make me happy.
As someone else said, I didn't know how unhappy I was as a dub. I was like the fly that lived in the vinegar jar, thinking it was the sweetest place in the world. Now I've tasted the honey, so to speak, and life is much sweeter.
Is everything perfect? No. Have I done everything I want to do in life? No. We have to accept the fact that there are some things we have no control over.
I am lucky that I have a non-JW family, so I actually got my family back instead of losing them!