Gift for doctor?

Okay so I have been scribing for one doctor for over 2 years and am leaving for med school this fall. I love my job and the MD I work for so much. We have become very close (like I babysit her kids close). I want to get her a goodbye/thank you gift that is actually meaningful and not generic.

In addition to writing a thank you letter, I found a great gift that is personal to her for about $100

Is this way too much to spend???? It’s hard to gauge because yes she’s like my “boss” but I would say we have become friends too which adds another layer