I really miss my teacher?

[Firstname]

So my teacher had to leave my school because she was moving an i really miss her. My friend was a lot closer with her than I was and I feel really jealous. My friend and I gave her a going away present and she was so grateful, she even started crying. The next day in class, she gave both my friend and I cards. My friend and her were more friends than a teacher-student relationship so in my friends card, she wrote that they should keep in touch and become friends on social media. In mine, she just wrote that she'll miss me, the gift meant a lot and that she'll think about me. I'm really sad because right as she was leaving we began to have a better relationship and I miss her so much. I almost started crying when I hugged her and said goodbye, and did start crying when I got home. I don't know what to do and I wish she hadn't had to have moved.