Adult friend
A small number of minor-attracted people have used the term adult friend in reference to their relationship with a younger person. The term carries no sexual connotation, and has seen limited use outside of the internet bulletin-board culture. The term "adult friend" evolved as a play on the terms boyfriend and girlfriend and is usually abbreviated as AF in writing.
This term is subject to the same ambiguity that lies around the term young friend, in that the term is used to describe a variety of different relationships, ranging from passing familiarity to strong companionship. Some who consider themselves adult friends feel a desire to actively benefit the child, while others feel no more obligation to a young friend than to any other friend.