Holidays are very hard, and I agree with you on public transportation, I hate it and I fear it, my husband has to drive me everywhere now.
You should let people know how you feel, they may not understand, but then again they may, so good luck. Talk to your counselor tomorrow about all this, maybe your meds have to be increased. But if you go to your family for the holidays, give yourself credit for getting up, dressing and being there, you deserve it and it will get better.