Since you helped Tohru, you saw that she was closer to you, she wanted your attention more. She seemed in love with you.

You knew about her feelings for you, but you never knew what to do, so you just let her show you her love in her own way.

When you got home, when you opened the door you saw how the dragon with her dragon tail offered you a cake, she didn't even say 'Hello' or anything like that.