A great question I think many of us face at times. I stopped playing guitar for about 15 years in my mid-life due to pursuing another passion which was fine art photography. BUT thank heavens I did not sell my beautiful guitars, because as that passion wound down, I took out my guitar one day and just the smell of it reignited my interest. I strummed my Martin D35 and said Ooo that sounds nice and off we were to the races again. So if there is no passion now, just stop. If it doesn't reignite, life changes. If it does reignite, wow that can be exciting. Constant change is the rule of life and if we assume a fixed "identity" of being a musician, then when we don't want to do it, we suffer. Impermanence is such a pain. smile BTW there is no criticism here, just sharing my perspective as I have gone through different musical phases.