Overcome disappointment.

Set realistic expectations for yourself.
If you’re trying to lose weight, for example, set realistic weekly or monthly goals. If you didn’t meet your goal, try to devise another plan you can stick to instead of beating yourself up.

Express your needs to others.
You can’t expect someone to fulfill your needs or desire if you haven’t directly expressed them. Make sure to directly communicate your expectations to others so they will know what and how to meet them.