egh.
indifference goes a long way there. i think allowing shit to get to your head would probably predispose you to even more anxiety and whatnot, which would not really help much.
generally, you have little reason to give that much of a shit about their antics.
just avoid 'em if you can/when you can, be apathetic towards them, and stuff like that...
...is what i'd want to suggest. but my case doesn't effectively work the same way yours does. i just hope it would, by my own experience of shrugging people off when they mock me.