AU where Kylo joined Han when asked, or where Kylo pulls a Zuko and joins the Resistance, or any number of things the POINT being that Kylo and Hux are on opposite sides. Then Kylo starts kidnapping Hux at random intervals, when Hux isn't being well protected. It's just Kylo, and he always lets Hux go, and it maybe started out scary but just gets annoying eventually and Hux can't figure out why Kylo would continue to capture him and then not even torture him for information (Does Kylo think Hux DOESN'T HAVE IMPORTANT INFORMATION he has the MOST IMPORTANT INFORMATION and this is the wrong thing to be indignant about but he's just under a lot of stress and confusion right now...)

Kylo just doesn't know how to ask Hux out.