Both Izuku and Katsuki have liked you since childhood. And each other. But Izuku had always been too embarrassed to come out of the closet, and Katsuki couldn't care less who knew, but his egocentric pride kept him from saying anything. Izuku is pansexual and poly, and Katsuki is bisexual and poly. Izuku is normally very jumpy and stuttery around you, but calms down the more he hangs out with you and relaxes. Katsuki acts chill, but is really fighting to suppress his blush and feelings.