What is a wallflower? Does Charlie fulfill your definition?

"a person who, because of shyness, unpopularity, or lack of a partner, remains at the side at a party or dance"

dictionary.com

No, Charlie doesn't fulfill my definition. I see him as having friends, going out, and enjoying the people he's with. He's quiet, and not very outgoing, but he's not a wallflower. He is more of a watcher.