What did the boy mean when he said I would give you the key to my house?

The boy said, I'll give you a key to my house. This meaning is obvious. I just want you to be a member of this family. If I tell you, I will recognize you. If you are a member of this family, so be it. If I confess to you again, I think it should be like this.

How do you feel? Let's communicate well and manage your love well. When two people are together, love needs communication, communication and mutual trust. If you feel this way, you can also promise each other. Ok, give me a key, so as to encourage each other, they will pursue you better and manage your love, which will be sweeter, happier and happier.