If she does not know you, then how can you really know enough about her to love her at this point? Or to be "in love" with her? You may be attracted to her or like what you see about her so far, but I think you have a crush on who you want her to be. The only way to really get to know her is to start a conversation to see if she is interested in spending time with you. You need to be honest, and also open to getting to know the real person that she is.