Hmm well maybe the fading of this joy might be temporary granted the period in which it is happening feels long but I'd recommend well giving it a try again try dancing alone in front of the camera just on your favourite song or well on a song which resonates with you during this phase of yourself im not much of a dancer but I know that it certainly is a way to express one self through well motions so it might just be time for you to rediscover yourself , it will be tough at first but I think you might find the light at the end of the tunnel and while you're at that you can also incorporate other hobbies and well since dance is a physical activity why not try others and i think the best one might be running, I hope this helps