why do you think you like your best friend? are you uncertain of your feelings? :O
either way, i think it’s better to just tell her if u still can (probably when you’re more certain about how u feel)!! if it wrecks ur friendship then ur friendship probably just wasn’t that strong in the first place… i don’t have that much experience though, so i’m just rambling(?)
i hope things go well for u !! <3