BTW, healthy people are dying young every day. Health does not guarantee longevity.
There are no guaranties in life and it's sure not fair but I still try and live my life like I'm going to live forever. If you keep looking ahead and stop looking back it keeps you more positive and that's half the game right there. Focus on what you can do and let go of what you can't. Besides being fit and active feels a lot better than being fat and out of breath.