After a while, he finishes up and heads back over to the counter "uh- sir? Your drink is done!"
Andrew continues to stare at him for... longer than necessary.. before lightly smacking himself in the face and whisper yelling at himself to "snap out of it- you fucking creep" he turns around, cleaning off the counter still talking to himself about how "that shouldn't be possible" and "even though it's fucking adorable he has to leave the poor man be"