Option 1: "I am your friend, aren't I?"
This tag assumes you are trying to confirm that you are the person's friend.
Option 2: "I am your teacher, am I not?"
This tag assumes you are trying to confirm that you are the person's teacher.
Option 3: "I am your student, am I not?"
This tag assumes you are trying to confirm that you are the person's student.
Option 4: "I am your neighbor, aren't I?"
This tag assumes you are trying to confirm that you are the person's neighbor.
You can replace "friend," "teacher," "student," or "neighbor" with any other appropriate word to complete the sentence and create a fitting question tag.