This is a normal(whatever normal means!) part of the process. You stopped pursuing so she is becoming icy because you are not following the crazy plan she has set in her head.
You will see her spin in and out of these moods, happy one minute, down the next, mad the next, happy the next...yes, get used to it. It hurts like heck, but it does get easier after time. Patience is your ally right now. You have not stopped caring, you are grieving for the loss of what you had. It won't be the same, it will need to be newly built. But you have to get through all the awful stuff first, sad to say.
Hang in there S4. Keep on posting your thoughts, it helps get the grief and feelings out.
Me:49 H:47 S: 16 T:27 M:25 My EA: 2001 His PA: 10/2007, 6/2013 Separated, but H still in house
Find your Shambala: a place of peace and happiness.