I don't know. I was tremendously happy when I graduated from college.
Remember how nervous you got when you graduated high school about 10 min's ago?
Means you are growing up, making the next decisions in your life, what to do next ect
Because now you have to go out into the real world!
Because it's a big world, and you can only go down from here?
I don't know, maybe you're an idiot.