Now she says I act like she doesn't exist.?

A couple days ago I was on my way out the front door when a text came through and it said “I want to know how you can act like I don’t exist”. Now my ex-girlfriend tells me to distance myself from her, leave her alone, and when I came to her to work things out she tells me that she is done talking to me. So I gave her what she wanted and left her alone like she asked. How can she get upset and angry at me for not talking to her when she put herself in this situation by telling me to leave her alone? I never did answer the text because I don’t know if its worth explaining to her something that she asked to have happen to her. The last time I saw or talked to this girl was April 4th, 2010, the day she told me to stay away from her, thats almost 3 months or more of no contact. She sent me other text telling me that she wants us to be friends like she intended and keep texting me asking what did I think of her offer, I never respond back.