I'm still in school so I can't tell you whether I miss it or not yet, but I have mixed feelings about school. On one hand, it takes up a ton of time, and it's pretty easy to burn out if you're studying in a room for hours on end. However, I hope the end result will be worth it. Having knowledge and being able to apply it is a good feeling.
I made some of my best friends in high school, and I still keep in touch with them even if we aren't in the same programs, so there's always that friendship aspect!
The paying thousands of dollars a year part though? I could pass on that