@LemonJuice
the keywords are "partner up" means he could choose (maybe) and "any girl from class" which from a viewpoint of a horny teenager, whoever you chose means you like them
@VINT64
"got a part" in the play/live stage performance, before it he just saw her doing practice, she's in the (school) club after all
ofc I'm just assuming here, but that's just how I remember it back from my high school days lol