Oh god..
Honestly, I feel the same at School sometimes.

I'd just be sitting on the bus, and some of my friends are sitting around me, and their all talking, and I'm in front of them, they look at me, and just continue talking, as if I said something wrong.

It just hurts. You're friends who you've trusted for so long just goes away at that moment.
Makes you feel like you're just- dead. Not alive.

But honestly, I feel bad for you dude. I know that sinking feeling in you.