I would call her tomorrow and ask her to respect *your* wishes rather than deciding what is best for you based on her own experience.

You are the expert on you, and I wholeheartedly support your desire for a letter as a momento of your time together and a way to hold on to that caring in a tangible sense.

I'm not like your therapist: when I left my first counselor after a few months of seeing her in high school because she was changing jobs, I had a photo and small gift from her and they're invaluable. I wouldn't trade them for the world and I feel NO shame for having asked for things I've wanted: isn't it critical in life to ask for what we desire? I don't think there's anything about asking that really has to diminish the gift. Asking is *not* forcing people into giving us unwanted gifts: it is about letting people who care about us know what would help us.

If she's unsure what to say, no doubt a short piece would still be helpful, just to the effect that it was a pleasure to get to know you in therapy and she cares about you and trusts that you will do wonderfully in life....

doesn't have to be a novel, and doesn't have to try to be the 'be all and end all' of letters.... not perfect, just human.

Best to you: I know how hard that is.