Well, as long as she's not moving then you'll be able to see her whenever. It does kind of suck that she left and that she won't be your teacher anymore, but you can always visit her if you want more training or just to hang out :)
I know how you feel My old music teacher left... she treated everyone like they were her children... she was so sweet :D I cried when she left too since I loved her like a mother
of course you're not over reacting. it's natural to cry when someone you love has left you :)
<3