Yes, totally. I'm marrying the love of my life next summer (/sappiness off), I'm not worried about money, my job is going great, and I have a great relationship with my family and friends. School is stressing me out a little bit, but not making me "unhappy" at all.
I'm a very easy-going person, and have always had an optimistic attitude. The only times in my life when I would have described myself as "not happy" for any significant amount of time would be when I was 11 and my parents moved us from Texas to Colorado and I lost all my friends and moved far away from the rest of our family (which all turned out for the best), and when I was 19 and my girlfriend of 2 years dumped me with no warning (lost 20 pounds in the next few months.) But I'm happier now than ever before.