The Andrew Boyer is a move that involves the want to date another person who has a boyfriend/girlfriend. First you explain to the other person that you have feelings for them, and spend a lot of time talking to them, and doing other things with them. Eventually, you should have created enough pressure of the persons relationship to cause them to split up with boyfriend/girlfriend. You then take the person on a date, and decide you have no interest in the person at all, tell them you have no interest at all, and then avoid them.
She left her boyfriend for him and he decided he did not like her while on the date. A flawless Andrew Boyer.