Imo contextually it does seem like Kanade is talking about feelings for Aki specifically though. Both from Aki's reaction and the fact that Tamotsu then asks if he's dating anyone rn which is a slightly weird follow up if Kanade was implying that he's never romantically liked anyone.
Regardless, I do think that it's very cute and a little subversive assuming that Aki is the one that has the bigger crush while Kanade is still working their feelings out. I think it very subtly comes across in how they act towards each other if you reread it, Aki's feelings of wanting to take care of Kanade and Kanade more so feeling respect and admiration rather than romance. And should mean pegging is still on the table if Aki's going to be the assertive one 👀