School Life isn't what I thought it'd be

I recently went back to school, and it hasn't been what I've expected it to be. Im the oldest in most of my classes, and certain students have ill feelings towards me, of which, I don't care about much. Although, they tend to show their ill feelings towards me in negative actions.

They do everything from squirt mustard on me and tell fibs to get me into trouble. I don't go to school to make friends, even though I have plenty. I go to school to keep my grades decent and hurry up and get out. I am an adult, and I have no time to fool around with these kids.

I tried telling the principal, but she's done nothing to resolve the problem.

At least it's Friday, and I have a date Sunday, so all is well.