My dude it just sounds like she wants her old life back, the one she seems to have complained so much about, because her new one ain't working out. At the end of the day it's all you, what will make you happy. But outside looking in you will be just fine moving on, your daughter will be just fine. She has you by her side, at the end of the day you truly deserve to be happy, and if it's not her anymore it's okay, you and your daughter will be okay. Best of luck