Happy 50th!!!!!

I'm a pup of 46! I am thankful for the life I have, but each year I feel a little depressed at my birthday. I'm usually a pretty upbeat guy, but have this hangup with age. I'm not sure how to turn things around so I feel better about getting older. I really wouldn't wish to re-live any point of my life, it's all been very fine. But somewhere I have let the daily bull**it take its toll on my general attitude. I never used to be this way. I miss the more carefree guy I used to be...............Is it possible to care too much?