Well actually what you consider as a simple question is in fact quite complicated.
Sure I could answer as "Happy", cause we all want to feel that way, so it's in our subconscious to act as we're happy, and eventually, maybe we'll really be happy.
To answer this question honestly, I must say I don't know. There's a lot going on in my life, just as any other person, and I can't really say if I'm happy or unhappy most of the time... It's definitely stressfull, not to mention the pressure of the people around you, whether it's your job, school, friendships, or people relations in general.
As I can't really answer it, I'll just say that I AM happy, and hope that eventually, I really AM gonna be happy...