He didn't go back to her because she was beautiful.
He didn't go back to her because he was treated badly by his new woman.
He didn't go back to her because she was there when he was lonely.
He didn't go back to her because he loved the way she stood up for herself.
He went back to her because he there was no else for him but her.
He went back to her because she was his soulmate
His one and only.