It may seem a bit on the edge but , what I say is
Do you want to see your son grow up and have children of his own.
I dont know the weight your at but, living longer and healther is about the best thing I can say.
And it all comes down to you making yourself get up head out and move that body. No one else is ever going to be able to get you to do something you dont want to do. But you can make yourself do something you have to do. Dont waste any more time, time goes by to quick before you know it your son will be all grown up dont you want to be there by his side watching him change into a wonderful young man?
Make that commitment to live a better more healthy life and give yourself the best gift anyone could ever give.