I'm Not One of Those Crazy Trolls

]Karkat Vantas wasn't the kind of person to really know how to handle romances. Yes, he was a romance expert and the only one who really understood but when it came to actually being in a romantic relationship, he fumbled hard. Really hard. It was obvious: He fumbled with Terezi and Jade, he somehow even fucked up a kismesis relationship with John! How was that possible!?!?

Until Karkat met Dave.

-----
Or a fic that doesn't fully follow canon but about Karkat's shitty way of handling relationships.

OR OR! An AU where they're all on the meteor and Dave never got with Terezi but had a crush on her simply.