I don't smoke, never done drugs (been offered some, but said 'no thanks'), only bet once in a plot (made money on Brexit) am happily married. So we've got a bit in common. I am also getting on a bit and despair at what may follow and I have the aches, pains and problems of advanced living. On the other hand - I have good contacts with young people, am valuable helping out with grandkids, feel very useful, am the press officer for our village, been preparing local church for Remembrance today and the Scarborough Camera Club turned up (as things happen) so I acted as impromptu guide and I'll be in their portfolios...etc., etc..
I do drink - we had a SUPER village 'wine-tasting' evening yesterday - lots of bonhomie and I learned lots and tasted new foods and wines. Smashing. I did leave this Isle for 15 years - but you take your attitude to life with you. My advice to you would to be look for the good around and join in small things - you'll be amazed what can happen. :)