My biggest fear is that we go in to the Jets game 9-6 with a win and we're in scenario, just to get my heart ripped out yet again.
Still remember post game tailgait in the Hammer lot after losing to the Steelers' second string, listening to the Rams (or was it the Saints?) drive in overtime to beat the Jets and saying "We could be so pumped right now" (we needed to win and the Jets to lose to make the playoffs).
Other scenarios too numerous to mention, every time we're ready to give up on a game or season, seeing a gilmmer of hope, then bam!
As the OP says, being a Bills fan is a neurological condition.