"live an unhealthy life" kinds of says it all.
It's never too late. Im not far off that age within 2 years) and call me crazy and everyone that knows me but my brain still thinks Im in my 20s, 30s at the latest. People say I look young. Though I dont think my body feels like Im in my 20s all the time *LOL* and that is ok.
I love living life, my days fly by even though I am retired. I have so many interests that I dont know if I can do them all by the time that day comes. I have so many interests and things I still want to do. The one passion I may never see is a pilots license and small aircraft. Not really in the budget and I have so much other stuff that I dont have the time but mostly still, not in the budget.
Just moved into a new home this year. Im doing my landscaping thing, people thought I was nuts this summer when I had 3,750 Lbs of 50lb patio stones delivered to my driveway with a fork lift and in 90+ humid degree day was loading them into a cart and moving them to the back yard. I plant trees and do say to people I'm not sure if I will ever see the height they are supposed to grow too in the coming decades but I plan on being around for at least half of it.
My family history on the male side of the family is horrible with heart disease and diabetes I swore at a younger age I would be different. I have avoided much of and almost all of that except for a few hic-cups but it makes me more determined then ever to stay fit, get exercise, and even though I always ate healthy (my family thinks an extreme but they see the results have worked well for me)
Im just trying to say, you need to find interests, pick yourself up, get interested in stuff. That interest can be a healthy lifestyle to start today. Read about it, nutrition, exercise make it a hobby and you will see your grandchild one day.
One step at a time, start with healthy lifestyle as a hobby not a chore once you are into that move into more interests. Get a small dog as a companion but first research on the care, feeding and training, again, as a hobby. Make everything moving forward into a hobby, a passion, make it fun, you seem to be dragging along, turn it around and make things happen and get satisfaction out of it, which is what a hobby is.
Ok, now time for my coffee, hope this makes sense.
Good luck to you, really.