You and Giyu are good friends. You always have been. You two were close and this caused you guys to get the occasional look sense it does tend to come off as if you were dating each other.. one day, at a hashira meeting, everyone just gets to curious. So they ask

Shinobu: “So.. when were you planning to tell us that you guys were dating?”

Giyu: “eh?- we’re not dating?-“

Tengen: “no, It’s fine. It’s flashy”