Buffy's relationship with Spike in the comics varies. Sometimes they have significant interactions and may even be romantically involved, but it's not a constant throughout all the comic series.
A common theme is the exploration of their forbidden love. Since Spike is a vampire and Buffy is a slayer, their relationship is taboo in the Buffyverse, and fanfictions often play on this aspect. Another theme is passion and desire, which is where the 'lemon' part comes in.
One popular theme is the redemption of Spike. Fans often explore how he can move from his villainous past to become a more heroic figure, especially in relation to his relationship with Buffy.
It varies from comic to comic. Sometimes they have a romantic connection, while in others, their relationship is more complicated or not existent at all.
The status of Spike and Buffy's relationship in the comics varies. Sometimes they are shown as a couple, while in other instances, their relationship is more complicated or undefined. It all comes down to the particular comic series and its plot.
Well, one common development is the exploration of their complex emotional bond. In some fan fictions, their sexual relationship becomes a way for them to understand each other on a deeper level. It might start as a purely physical attraction but then evolve into something more meaningful as they share their insecurities and past traumas.
We can encourage fans to focus on the emotional aspects of their relationship. For example, write about how they support each other through difficult times. This can bring out the deeper connection between them.