(Spoiler)
True but possessive friends can also indicate romantic feelings too. The mc always get visibly upset or jealous when her friend spend time with other people, especially guys. The mc insist on knowing her friend whereabouts at all times and get upset if she doesn't respond to messages or calls promptly. She become upset or needy if she don't give enough attention from her friend. Even stalking all her guy friends is pretty gay. I guess it can also be possessive friends but I think she kinda like her romantic In my eyes long ass explanation but if you feel that way then that's okay too lololol I can also see it
I don't get some persons who insist or think that she must be in love with her friend. There's a thing called possessive friends