Dream About Childhood Friends And Driving Permit

I was at my high school and for some reason, kids from my childhood school (and are now older) came to visit except for the one I'm still in contact with. One of my best friends I ended up following all day and got to hug her and then the dream ended and I woke up crying. Also during the dream, I was rushing around trying to find my drivers permit because I left it, and that's what lead me to see a bunch of kids I used to know.