Yeah, it sucks major globes. But unless you're completely unrecognizable from the Terezi I know, I'm still going to treat you the exact same way as always! So, you know, like my awesome fun friend who can be way put together than she gives herself credit for. And quite frankly, doesn't deserve half the people she surrounds herself with. Myself included! So have a little more confidence in yourself and leave the miserable moping to the experts.

[ You know. Like him. But putting that little pep talk aside, Karkat is trying to take everything else Terezi said into consideration. It helps that her own emotional issues are tragically similar to his, even if limited to just one quadrant. Perhaps that's why what he says next is particularly significant, considering their shared history - retcon or not. ]

If you're so afraid of losing her, or worried that she'll cheat without realizing it, then you should let her know and figure it out together! Otherwise... you're going to regret it.