Ouch, the last line stung. This was nice, and cutesy. I like how the tone changed to a little more serious, but still very light when addressing the pessimists. Strong rhyme scheme but sometimes awkward wording, such as "But as for it being false, I assure you it is not," though I understand the need to follow the rhyme scheme.

cute! a nice change from all the angst and heartbreak from out there! good write!