You do not ask her why she blocked you on Facebook. Leave it alone. She looks to you as the enemy and if you question her about it, it lets her know that you still care, etc.
Friends? Friendship to the crisis individual is not the same as being friends w/someone who is a true friend. Take a look at what she's done thus far...would you treat a friend the way she has you? I don't think so. Right now, she's not your friend and you need to treat her as just an acquaintance and nothing more. She's not the person you feel in love with right now.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.