It's challenging to provide a precise answer without knowing more about the context and the dynamics between you and your teacher. However, there are a few possible reasons why a teacher might say something like that:
Emotional attachment: Some teachers form strong emotional bonds with their students, especially if they have been teaching them for an extended period. Your teacher might have developed a genuine fondness for you and could be expressing their sadness at the prospect of you leaving.
Feeling of connection: Teachers often invest time and effort in their students' education and well-being. They may feel a sense of pride and fulfillment in seeing their students grow and succeed. The idea of you leaving might evoke emotions of loss and separation for your teacher.
Sense of responsibility: Teachers often see themselves as guides and mentors for their students. If your teacher believes they have played a significant role in your life and education, the thought of you moving on to a different school could be emotionally impactful for them.
Fear of change: Change can be difficult for some people, including teachers. If your teacher is used to having you as a student and is comfortable with the current classroom dynamic, the idea of you leaving could create anxiety or fear about adapting to a new situation with different students.
Expressing concern: In some cases, a teacher might say something like this to convey the importance of your presence in the classroom and how much they value you as a student. It could be their way of encouraging you to stay or reconsider your decision to change schools.
It's essential to remember that teachers are human beings with emotions and personal connections, and they can form strong attachments to their students. If you are considering changing schools and your teacher has expressed strong emotions about it, it might be a good idea to have an open and honest conversation with them to understand their perspective better. Ultimately, the decision about changing schools should be based on what you believe is best for your education and personal growth.