The girl said she was going to see the house, and I said, then you go. She said, oh.

I wonder if you two are lovers? If a girl in love tells you that she is going to see the house, it means that she wants you to accompany her to see the house. As a result, you said you should go, but you didn't mean to be with her. Maybe she's unhappy. As a boy, she doesn't take the initiative at all and doesn't go with girls. If you are good friends, the girl says she wants to see the house, maybe she just tells you, maybe there is no other meaning, maybe the girl has a crush on you, or just wants you to accompany her to see the house. I think it's better for you to suggest going to see the house with her.