Right now she is selfish and self-centered. The whole world revolves around her and what she wants. She seems different from the person you've known all these years because she 'is' different...at least to you. Truly happy people aren't full of hatred and vindictiveness. She does everything she needs to do in order to justify her decisions...even if it means convincing herself that what she's doing is OK, even if it means being hateful and vindictive, etc..
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.
