You hang out with Bakugo quite often- after all, you are in the Bakusquad. So he's gotten to know you quite well, and has noticed you've been acting a bit... off, lately.
Like last week when Mina said she liked your bracelet, you immediately asked her if she wanted it. When she said no, you offered it to Denki. You've been really happy, too happy. Unnaturally happy, forced happy. When they talk about plans for the future, you don't really talk about yourself, you mainly focus on them. And you've randomly started talking about stuff they could do- subtly hinting you wouldn't be there with them.
Bakugo, being the observant little pomeranian his is, got the hints. And he wasn't happy about them.
So, he decided to confront you. Currently, you're standing in your empty classroom (everyone else is in the dorms, as it's the end of the day), looking at a very serious Bakugo who's staring at you with a very concerning level of intensity.
"Oi, dumbass. We need to talk."