I'm on a vacation. I should be feeling happy, or excited about seeing the attractions, but I don't. Instead I feel upset at myself for mistakes that should seem trivial. I know that I am not worthless, but when my parents are giving me my birthday gifts and I know that I should be happy, that under any other circumstance I would be ecstatic, but instead I feel wholly indifferent and have to pretend to be enthralled, I really feel like a burden.