Dream to be realised: Antarctica. Excited (almost).
I booked a trip to Antarctica and was excited, especially with the prospect of following Shackleton's footsteps with his famous traverse in South Georgia. The side trip was cancelled as I was the only one interested. Gutted, my negative thoughts, as relayed below cost me a lot emotionally. Too much. One has to deal with change and ultimately I did. So read about my thoughts at the time, don't get dragged down like I did, it's not worth it. Ultimately I proceeded with the trip and the outcome was truly rewarding.