Is it odd that i am like killer protective of one and onley one of my friends?

some days i don't want to talk to her cause im upset and she goes off and starts to cry and i end up hating myself and go cheer her up and one day a girl threatened her and told her to quit liking a boy and it shattered my friend and i found myself doing anything i could to cheer her um and i actually went and beet the skittles out of the girl that hurt her is it weird that i only protect her and i have dreams about her but im pretty sure im straight