I'm overflowing as well.
Optimism is a way of life for you — in fact, you look so hard for the bright side that you run the risk of being blinded by the light. While there's certainly nothing wrong with keeping your spirits up, there's also nothing wrong with acknowledging disappointments and hurts. Putting a positive spin on almost everything is a strenuous effort, and chances are you feel pressured to do karmic damage control not just for yourself, but also for others who have come to rely on your cheerleading abilities. In the end, your positivity is a precious resource that you must conserve and protect. Think of it as an overflowing glass of water: How much energy do you have to expend just to keep any liquid from spilling? A better focus for that energy might be training yourself to ride out (rather than deny) inevitable difficulties, trusting that your irrepressible spirit is up to the challenge.