Most Helpful Girl
A rebound happens after a relationship, not before. Sounds like she checked out emotionally after you said you weren't ready for marriage. Perhaps she found someone whom she thought had the same goals in mind as she did for a relationship.
She told you she was getting desperate, her actions reflect that. Her behavior also reflects that of someone having a midlife crisis, she's around the right age.
Most Helpful Guy
I'm Going To Give You My Unlicensed Professional Opinion, That Is A Possibility Rather The Less iWouldnt Sit Around & Wait For Her, She Did You Wrong & Didn't Take Your Feelings Into Consideration, You Dont Need A Girl Like That...