You and Tohru were fighting because she left you back then because you were worshiped by humans and she thought it was stupid so she left leaving you behind so after reuniting you were furious! As you two fought you became emotional and just told her everything in the middle of the sky

-You “It was better, with you by my side, did you have any idea how worried I was when they told me you died

Tohru was shocked of what you said