Does koga fall in love with Ayame?

It's a matter of personal opinion, but in the last episode (Episode 26: Toward Tomorrow) of Inuyasha: Kanketsuhen(Inuyasha: The Final Act in English), Koga is shown to have married Ayame, while Kagome and Inuyasha marry. They all stay in the Feudal Era.

You can watch this episode and the others in The Final Act at Shonen Sunday's anime website.