I don't think this song is about groupies or high school relationships. It seems to me that the girlfriend didn't feel cared for and appreciated, so she's getting ready to leave. Meanwhile, the singer feels that he's never really expressed his emotions for the girl, hence the "Wait, I never had a chance to love you." There's a definite wish for closure here, and a realization of what would be missing if the relationship ended.
I don't think this song is about groupies or high school relationships. It seems to me that the girlfriend didn't feel cared for and appreciated, so she's getting ready to leave. Meanwhile, the singer feels that he's never really expressed his emotions for the girl, hence the "Wait, I never had a chance to love you." There's a definite wish for closure here, and a realization of what would be missing if the relationship ended.