maybe I wasnt reading properly :( but I dont get the ending D: did she realize that the other girl was an asshole?

I think she was aware of it, and even aware that she herself was only looking at the surface when she said "you're cute" and "I like you" to the other girl, knowing how easily she put up a false front.

But of course, most of the Maiden's Cake stories are about girls completely failing to get together with other girls.

I don't think the ending had anything in particular to do with anybody being an asshole.

Risa liked stuffed animals because they were cute.
Izumi liked Risa because she's cute.
Nakabayashi (the guy) criticized Risa's fondness for cute things, saying she only cared about appearances.
Risa apparently gave up on stuffed animals in order to appeal to Nakabayashi.
As Nezchan described, Izumi felt her own attraction to Risa was shallow, because of how easily Risa gave up on her inner character (liking cute things).

The ending comes as Izumi discovers that Risa hadn't given up her love for cute things after all, and was still the same on the inside. Risa's love for cute things is an integral part of her, because (as Risa says) she's "a girl". Izumi decides in the same way not to give up on her love for Risa, because that's also an integral part of her. So the ending is about Izumi calling up Nakabayashi and telling him to let her come along so she can harass(?) them on their date.

^wow this story was kind of depressing lol

^wow this story was kind of depressing lol

That's Maiden's Cake for you.

^wow this story was kind of depressing lol

That's Maiden's Cake for you.

right, this artist can be really cruel, but it's difficult to dislike

Why do I keep reading this while listening to mellow songs?
I like it, though...

all of them were kinda assholes though