Question for women-Why is it that if I show interest in my ex...?

She basically craps all over me and says we are done! Stop calling me -don't text me...
THEN when I do this-she calls me and starts texting me -or she sees me and tries kissing me and telling me how much she misses me?
Other guys say-women can't stand being ignored. Is this really it? Or am I showing weakness by calling her and telling her how much I miss her because she acts like she doesn't care when I say these things.
***A little brief background-we were together 11 years-she filed for divorce on me in March when I was stationed in Iraq-I'm back home-2 kids in our marriage-ages 2 and 8. She also tell me "I don't look forward to our divorce date-I hate thinking about it". But then when I call her- "WE are finished!!" It's like ignoring her makes her open up to me-but when I "chase her" by calling her and stuff-she is completely ice cold.
ADVICE?????

To answer the below posters question...No I did not have any king of affair while over in Iraq.
Did she? This is something I don't know. We began fighting alot via phone whil I was gone for 15 months...she said she felt we became "Un-compatible"

She's a very mixed up person and more than a little cruel. She feels chased and pressured when you call her and yet on the reverse she's miffed that you have moved on so "easily" when you dont call her. So then she calls you. So she can have an argument with you again.
To be honest she cant seem to live without arguing with you all the time. You cant do anything right, it seems like she needs some one to hate. If she says we are finished when you call her, tape it and play it back to her when she starts saying she misses you etc. She's being very unfair.

Shawn, it sounds like she's in it for something............money maybe? It also sounds to me that this female is "bi-polar-

Maybe try stopping to have any conversations with her, except where the kids are concerned. Why not file for full custody of the children?
NO, NOT ALL women are like her! She does have a mental disorder and is up to getting something other than a divorce from you.

She is playing games with you! She obviously needs to know she can still have you, but when she has you she doesn't want you! Leave her alone! She isn't worth all that emotional pain! Focus on your children and let her find someone else to play with!

She is playing games, she doesnt want you. Her calling/texting/kissing you is for her own ego! She wants to know she can still have you if she wants you. Seems she has you on the back burner, just in case!