Overall I'm happy with my life right now. It's not perfect, but to say no would imply that every day I'm miserable, which simply isn't the case. Right now I live in a nice apartment in a fun city, live without incurring debt, and have plenty of friends. I have a very loving boyfriend and I just got a new iPad so things are going fine.

The summer is shaping up to be very fun with plenty of weekend excursions.
I think the trap is to let others decide whether you should be happy or not based upon your circumstances. For example, I have a friend who makes about $145,000 a year and lives in a very nice house. However, he is not happy at all (this is what he told me--not my judgement). He doesn't think he makes enough money, works 80 hours a week, and has a $400,000 mortgage.
Yet, he looks at my life and knows my lower salary, the fact that I don't travel very much, and don't own a home and to him I *should* be very, very unhappy -- and he says so. It's as if he is trying to "infect" me with his version of what success should be and convince me that I should be unhappy--and more so than him.
Maybe in 20 years our roles will be reversed and he'll be the happy one in his nice, paid off home and cushy retirement and I'll still be slaving away at work and dealing with rising rent prices. But, I'll take what I can get today.