Luck buddy, I will put it to you in some vulgar terms.
SHE DOES NOT KNOW WHAT THE [censored] SHE WANTS!
She's just not happy and believes or she at least she convinced herself (was convincing herself) for at least the last 2 years that the reason for her unhappiness is YOU. And this is not going to change over night. I mean, you see, don't you, that she is unable to comprehend that it is her fault how she feels. Well, she can't. For all intents and purposes she is an emotional infant.