This may be a hot take but Tate and Aiden would be cute together even if they HATE each other's guts.
Honestly, if neither of them were datable, that would actually be fun. Not gonna lie, I hate when games make two datable characters date each other in different routes. Like, if you first romance Aiden in his route and then play Dillian’s, it kind of feels like cheating to watch Aiden fall in love with Tate. Or if you do Dillian’s route first and then Aiden’s, it feels like homewrecking because in another universe, he’s already in love with Tate.