There have been some good suggestions here.
I will say that it’s not uncommon for interests to change/shift. Or sometimes one can get burnt out from something for awhile. Sometimes taking a break from something, then coming back to it can renew your interest in it.
I’ve been a serious martial artist since age 13 (I’m 57 now). Up into my 40s, I used to train like crazy, totaling hours a day, including physical conditioning. I trained both here and overseas. It was my number one passion, and I have other passions as well. Due to circumstances...a nagging injury, as well as other responsibilities...my life shifted. I still train most days, but by myself, and nothing at the level I could when I was younger. Even so, it’s still a lot more martial training than most people my age do. When I was young, I always envisioned training the same way even when old. But life is about changing and adapting. Even without the injury, my interests and responsibilities would have evolved and shifted over time anyway.
My point being, it doesn’t necessarily mean something is wrong with you. Only you (or maybe a professional) can really answer that.
I actually suffered from depression for decades (from my teens through my 30s). It wasn’t a 24/7 debilitating thing. But it was always there, sometimes worse than others. I was eventually able to beat it without any medication at all. I can’t say that can be true for everyone, and it certainly didn’t happen overnight. Much of that had to do with spiritual (not religious) experiences I’ve had that I won’t go into, that shifted my view of self and life.
Back when I read the paper, I used to read the Dear Abby column, and sometimes she’d get people complaining that the best friend they grew up with isn’t keeping in constant contact with them in their 30s. Or they no longer enjoy the same thing they did all their lives to the same degree. Life changes, and people (all of us) change. I don’t see things like that as a problem but an opportunity. Often it can be a sign to open our horizons and grow in other ways, and develop new interests. Or perhaps look at that existing interest from a new angle. Otherwise things can become stale.
Anyway, sorry for the rambling.
Jim