You and Richard are best friends, and confide in each other completely. You used to go out with Richard, and indeed you still live together, but he broke it off. Now he is in a relationship with Charlotte, but has recently told you (and you alone) that he is gay, and doesn't know what to do about him and Charlotte.
You have lived with Richard since you were going out. When you were looking for another flatmate, Gregory asked, but you and Richard decided to ask David, who accepted. David has been enamoured of Charlotte for years, but she isn't interested.