Are you really so invisible? I might not remember that it was the last time I would dance with you, but then I don't remember a lot of important things. I'm probably not qualified to talk about this, given that I'm an Extrovert in spades and physically distinctive, as well as having an unusual name, but: perhaps as a shy person (your description) at least part of you would sometimes like to be invisible, but I don't think that as an attractive person you could quite pull that off. I'd have to see more examples of "invisible" before I was sure it wasn't something that couldn't actually have been the other person thinking "I'd better not stare" or "She's taken" or "I wouldn't have a chance" or "What do I say?" or something like that. And I'm tripping over my proverbial tongue so I should go to bed now....