Did she say that? "I like you
only as a friend"?
Did you TELL her honestly what you feel for her? Did you tell her what you exactly want? From your posts that's not clear to me.
You have to tell her. How can she be open, after having been hurt badly, to a man who sleeps with her but does not tell her he loves her like crazy?
Tell her honestly how much you love her and what you want and ask her what she wants.
If she says "no", or "not yet", you'll have to accept her decision. LoA or not...
Good luck to you!