[apr]

Originally Posted by Neki Ecko

Uhhhh, I think people is getting the wrong idea about this.

Spoiler for Engaged part:

I think he used it engaged to tell his grandparents, so they wont get worry about her, even know he should say that Taiga was his best friend or girlfriend, they are not offical engaged or anything like that

No, they're engaged alright. At least in the book. Well, engaged-ish; I don't know if you need official approval for these things in Japan.