Loosing passion for music?

I am a singer 19 years old ben singing for years, Im in a band but just feel I am loosing the passion. band is a pain in the *** not working out. I just don't feel as I used to but i don't wanna loose the feeling. I warm up and practice everyday warm up is about 20 mins. It feels like its becoming a chore but if I don't practice as often my voice starts to get less powerful and sounds bad then ;/ what should I do? i dont wanna give up