Why is it so hard to let go of the negative and focus on the positive? We're comfortable with our negative feelings. They're natural after all. But they're not all we are. Once we've experienced the disappointment and wrestled with it for a time, we need to let go of it, so it doesn't become our focus, our way of being.
Try exchanging it for a smile. Notice the birds, the flowers springing up, the sun (when it's shining), people who need us. Smile because you can. Smile because God has done marvelously incredible things. If that's not a cause for joy...
We will always be disappointed - in people, in situations...but there are things so much bigger than that, reasons to be joyful. Joy is a choice we can make instead of disappointment (or anger for that matter).
Joy brings happiness in time and a change of perspective. Choose joy! :-)
I'm a wife, mom, pastor, human...probably not in that order. I struggle each day to be faithful to God, to my family and to my call as a Christian and all of those previously-mentioned roles. I pray to be positive, kind and thoughtful, but tend to fall short on all counts. I am inspired by sunrises and enjoy taking pictures (mostly my kids, deer in the yard and sunrises). I waste time playing stupid computer games and wishing I'd been better at all of the aforementioned roles. ;-)