A Last Minute Meeting Request at the End of the Year The class and year has ended.   I wanted to meet with  a professor who served as a great mentor with me during this year. I wanted to thank her in person and discuss pedagogy. I unexplainably dissed her by leaving at the end of the last class without thanking her or saying goodbye.

Feeling great guilt and disappointment, I emailed her to set up a last chance meeting. She responded with a long winded email about how busy she was [possibly a polite-go-away], but suggested possible times a week later. 
I responded, in a clearly selfish and urgent manner, that I was available after the dates she suggested. 

She responded with a "ok Ethel... i will write to you when I'm finished this week." 

Upon further consideration, I feel that I might have come off as entitled to her time. 
I'm considering taking back the meeting request and just writing a heartfelt email instead, possibly before she has a chance to attempt to set up a meeting.

Does anyone have advice?
This might be a very busy time - grading, exam board meetings etc.

As she is prepared to set up a meeting, then meet and thank her in person - it’s always nice to receive feedback / thanks / recognition...