6. When he stops sending messages
He stops sending messages about little, normal things, such as what he did or ate that day or just to say goodnight. A Japanese girlfriend will begin to think he is losing interest and will feel insecure on where they stand in the relationship. Be careful not to forget about how you felt at the beginning of the relationship. The intensity and excitement might not remain the same as time progresses, but it is important to maintain some level of that feeling.