I find that my interest in my various hobbies always seem to fluctuate. Some time I'll be super into working on the car, then I'll be into skiing, then I'll be into RC, then shooting, etc. Other times I'll go months without touching or even caring about any of those hobbies. For example, I haven't shot any of my guns in the past 2-3 months and currently don't have much desire.
I always just give it time and I will eventually pick it up again. That's why I don't sell any of my old hobby stuff that I'm not currently using. I know I'll get back into it before too long.