I came close to giving up some years ago. Instead I started collecting unusual bass guitars, although I've now reduced the collection somewhat.
I kept my hand in, played with a folk outfit for a bit but quit that when other members demonstrated their lack of regard for the time I was committing to the project. Then I got contacted by a lifelong friend and former bandmate asking if I'd be interested in getting involved in a musical project with him and a very talented songwriter. I seized the opportunity, and now at the age of 51 am playing the best I ever have - creating music I am immensely proud of (including singing! ) with two great mates. We have a good laugh, we perform professionally and I am so glad I didn't jack it in.