Life will disappoint you on a regular basis, in ways that are big and small. The way to get beyond each disappointment is to get busy doing something positive and meaningful.
It's easy to get caught up in assigning blame, or speculating on how things might have been different, or feeling anger and resentment. None of those things, however, will add any value to yo...ur life.
Choose instead to let the disappointment make you stronger and more positively determined. Acknowledge it, and then step forward from it with productive and meaningful action.
When you feel like indulging in self-pity, take that as a prompt to break free from the negative pattern. Use it as an opportunity to initiate an improvement in your world.
Disappointment is a fact of life, but it never has to weigh you down for very long. You can always decide to focus on the positive possibilities in the present moment instead of the shortcomings in the past.
Make the smart choice, and live by intention rather than by chance. Whatever may happen, use it as a starting point for making life better.