It seems to me the best relationships, the ones that last, are frequently the ones that are rooted in friendship. You know, one day you look at a person and you see something more then you did the night before. Like a switch has been flicked somewhere, and the person who was just a friend is suddenly… the only person you could ever imagine yourself with.
Scully (Gillian Anderson)
— The X-Files, “Rain King” (S06E08)