I've never got that whole love thing. Seems to be different for everyone. Although I do have a crush now and again. Can't seem to make anything work out. Not worried though. I wasn't looking for a serious relationship.
Seems like you this e her a lot. But is it love? It just sounds confused. Like how you stick up for her. I mean you'd do that for a friend that you care about too.
Um about telling her your feelings. If you want to do it just right, give her little things. Like maybe show her something that shows you're attracted to her but make it look like an accident. Like a picture or drawing of her.