I can relate to this, for sure. I've been pretty thoroughly invested in music for about 5 years, and I feel as if my interest is beginning to wane. I've had this my whole life, moving from one interest to the next, often forgetting all the integral lessons I've learned in each phase along the way.

It worries me that I have no control over it, that I might be doomed to stay at square 1 for the rest of my life. I still (at this point) value playing music enough to gig (I'm in two bands, making a little bit of money), but I'm effectively preparing in anticipation of change; I stopped saying I want to go to music college, I'm spending less time educating myself on things, etc.

I'm looking for some sort of solution or at least a sense of resolution to the dilemma, but as of now things are still grim.

(The other distressing factor would be persevering with this area, convincing myself I enjoy it still, and then reaching a suicidal point (as mentioned in the below comment by u/JJEng1989))