He also isn't big into music from what you said, so it probably isn't a priority to him. I honestly wouldn't even bring it up, it would feel kinda pressure like to him possibly. Just let him say something if he has gotten around to it, if no, then that's ok. Share the lyrics out loud or whatever.
And part of therapy is being vulernable so while it's a **** feeling, it's good when you feel it, it means something is working.
People share songs with people all the time, so for most people it's not gonna be a big deal. I probably wouldn't even have gotten around to it myself yet, mostly because I'm super lazy about music LOL....
I'm sure he will be there, he seems to go often, and if no, there's always Tuesday. Just breathe.