Longings vs. Failures

Throughout my life I have always considered myself an optimist. My mother always commented on that and I genuinely believed that the proverbial glass was half full. I started to take refuge in that and "everything's cool." That's just how I roll and always have.
So I started going through one of the text books that I breezed through without much thought. I don't even remember the class, and I just remembered the name of the professor that taught it (I'm on the 5th chapter). This book is supposed to be used for small groups but it also is a pretty good self devotional book, titled Holy Conversation by Richard Peace. Just for a brief overview, the book is set up to facilitate conversations with believers and non-believers about... well God (sounds cliche).
Well Mr. Peace has brought up a small amount of inner turmoil for me. As I stated earlier I am on Chapter 5 which is entitled "Talking about Need." I read a small passage talking about a guy who had everything going right in his life. Then the discussion questions are designed to for us to probe inward at what makes us tick to see how to talk to other people about what makes them tick. These discussion questions started talking about the longings and desires that we feel, and asked how God used these or fulfilled these. The page and a half talked about how we can easily talk about our hopes, aspirations, longings, and desires rather than our fears and failures. It states clearly, "The bottom line. Wheras it is often difficult to talk about our faults an failings, it is much easier to discuss our hopes and aspirations. These longings come from God and direct us back to God."
I wrote a side-note. "Why do I feel opposite???"
So thought... and I prayed.... and I thought some more. Am I not a true optimist? I'm feeling pretty negative right now. I feel like my half glass of water has evaporated and I just have the white crust at the bottom.
As I sit here writing this I am just constantly looking at the word feel two lines up. "I feel" "I'm feeling" I'm getting off this emotional roller coaster. I choose to see my cup as Psalm 23 says it to be. Sorry if I disappointed you and you wanted to have a pitty party with me.