Look forget the romance angle (which Kei never noticed or much wanted to begin with), at this point you're just a straight-up dick for treating your friend this way.
Make plans? Show up, or cancel outright. It's not that hard. Just don't leave someone standing on a street corner waiting for you.
Mom & Dad: "Well, if that's really what you want! Just so long as you aren't planning to bone your sister or something! Hahahaha"
Ritsu: "Hahahahahaha... haaaaa..... ummm"
Sorry some people are frustrated by others wanting to think/talk about it. Maybe don't read the comments if you don't want to hear people discussing things?
Anyway never mind whether Leo's gay, for whatever reason she isn't buying. Do we want Fooly to be happy or don't we? Maybe someday she...
Yeah, Helga is the future.
The gender-bent arc proved what's really going on here: Leo is fond of Fooly but is basically into girls. If she really was into him there wouldn't be this eight-years-long "silent understanding" crap, they'd be in an actual relationship. But he's a guy, and that...