well when before i was dx i didn't want to do anything except for sleep. But i play volleyball and always have and it is a lifelong dream of mine. If sports and music really inspire him, he will go back to it. I couldn't play volleyball for a season and i was really bummed, but i was still in the chorus because i like to sing [not as well as i want to but hey, can't have everything right? haha]. In his heart i'm sure he knows that he can't live without sports and his music. it will come back to him, but just incourage him and let him know that crohn's disease is a motivator, not something that should hold you back from your passions!=]