This is my own opinion, but I think that girls are the most cute when they're in love. Yes there's when they're embarrassed though I have to say that when they're in love they occasionally act out of character in the cutest ways. I've never really been in a relationship (at least not one irl :3) so I'm not sure how girls really act when they're in love. However from what I've seen in anime (exaggerations yes but some do apply) a lot of girls in love act just crazy cute like Shiina from Nogizaka...