Also in the Pegg and Frost oeuvre, the entirety of Mike's feelings towards Tim in Spaced, although admittedly the show doesn't really try for a heterosexual explanation there. And in Paul, Nick's character (I can't remember which one is Clive and which is Graeme) is jealous of Simon's character's new gf in a way which, despite the script's efforts, really doesn't read as "I want a gf of my own."