Twilight's been acting strange recently, and I know why. Should I give into temptation and become more than just her number one assistant, or will it ruin the friendship that we've had for so long?

First person Spike POV. (Presumably sometime after season 4 or 5. Spike is an adult in this continuity, and he's physically maturing. For unknown reasons, he's been an adult for a while, but his body is only now catching up.)