Something similar happens to me with my only friend.
We were exchanging messages to meet each other. For different reasons we postponed the meeting. Last time I took the initiative but he was busy and now I have been waiting for him to initiated but he hasn’t done it.
I doubt whether contacting him again or not. I don’t want to force him. Maybe I will only contact him to ask how the course began. He’s also a teacher. I don’t know it. I have my doubts because I know he appreciate me.

Maybe, you could contact her only to ask how she is doing and see what happens. How do you think she sees your friendship? Each case is different. What do your guts tell you?