You hate S bc she try to take advantage towards F, your best friend.. S is his friend. The more she being close to F, the more F leaves you behind or forgot about you. (He calls you Angel. Don't ask why) S is also copied you, which she wore a ribbon at the back of her hair but a different one. However, she doesn't want to be evil. She just wants to make F likes her.

(Authoress: start however lol 😑)