Why do I feel a sense of disappointment and I don't know how to process it.

I'm a single, male, 31 year old, and I'm been feeling disappointed for the last couple of years.<br><br>I've always felt disappointment after every failure, but this time I don't know how to deal with it.<br><br>It's not a feeling of sadness, there's something different.<br><br>I'm feeling disappointed in everything I see, everything I do, and my entire life.<br><br>How can I deal with this mind state? Has anyone experienced it?