If you've never read the lyrics(I posted a link to them), the song is about how overly dramatic and immature people are(teenagers).
I stopped talking to most of the underclassmen I was talking to just a couple of days before I graduated when I finally got there. I've been wanting to bail on high school since I got there, and graduating allowed me to "spread my wings"(sorry for the metaphor). I don't know why, but most of the people who graduated with me are just more mellow. In high school, I wouldn't have talked to a TON of the people I graduated with, but it seems like I've hung out with most of them at some point since graduating. I have no idea if this is just me over-reacting, but I sure feel more relaxed.