The good Elphie was being prodded closer and closer to the surface as Galinda cried out in pain and kept pleading with the witch, refusing to let go. But the wicked witch was refusing to relinquish control, if only because Elphie wasn't able to handle the pain. There was also the fact that if Elphie snapped out of it now, she never would forgive herself for hurting Galinda like this. It would only solidify that she didn't deserve Galinda and that she should let her go. If she snapped out of it now, there would be nothing Galinda or Elena or Caroline or anyone could say to her that would make her think she deserved love. After this, she deserved to just rot away somewhere alone.
"Let go of me!!" Elphaba was still trying to get Galinda off of her. She finally let go of her arms, then grabbed onto her shoulders, again burning her, trying to push her away. "Get off of me, Glinda!!!" She well knew this version of the blonde went by Galinda, but when she was the wicked witch, she'd referred to her as Glinda. Still she struggled to get away from the blonde, hurting her to get her off of her. But the blonde had far more resolve than she'd thought.