Don't know what to do. Advice?

It sounds like you're a really deep thinker with plans and hopes for the future. Since y'all are such good friends, she's probably the same type of person, right? I think you should tell her how you feel, and let her know that you want to be friends with her no matter what. My guess would be that she probably has some sort of feelings for you, too. You never know until you try, but I would be amazed and flattered and basically swept off my feet if someone declared their love for me ran as deep as yours does for her. Good luck!