@Xazer
MC is jealous of Hiyama (lesbo)'s appearance and popularity, because MC has very low confidence in herself and that she wouldn't be a good match for the cool looking/popular guy.
MC's low self-esteem is annoying, and some people would think it's illogical, but lots of teenagers do have similar issues.

Translator note was awesome

Blonde is creepy, hope mc sticks with the guy

Imagine getting proposed to after a bout of self deprecation

Is the girls has amnesia problem here?
She has mentioned many times she is a lesbo yet she still envy of her close to.him?