(1) Man, this ain't good. If this next (relationship/job/class/whatever) doesn't immediately grant me profound and instant satisfaction in all areas of life, I'ma just throw up my hands and say "fuck it".
(2) OMG THIS (relationship/job/class/whatever) IS THE BEST THING, AND THIS PROFOUND AND INSTANT SATISFACTION IS GREAT AND WILL SURELY NEVER END
I am not, thankfully, feeling this generally about life — you know, instead accepting that both good and bad things are tempered by the fact that they will eventually end — but I noticed that working on a given difficult mathematical proof makes for an excellent simulation. "DAMMIT I WILL NEVER LOVE AGAIN" is fallacious for the same reason as "DAMMIT I WILL NEVER THINK OF ANY DIFFERENT APPROACHES TO THIS DIFFICULT INDUCTIVE TYPING INVARIANT FOR UNIFICATION".
I'm to understand the former is more part of the typical "human condition", though.