I have been disappointed by many people, and I’m sure I’ve disappointed a lot of people myself. You know your friend better than I do, but I’ll bet you anything she is really struggling with how to respond, especially if part of her worries that you may be making the wrong decision. It is so hard to disagree with and still support someone you care about. This might be way too doormat-y, but I wonder if it might not be helpful to send her a follow-up letter or email saying something to the effect of, “I was surprised not to hear from you, but then I realized I must have laid an awful lot on you at once! I hope you’re okay, and would love to hear from you, no matter what you have to say.” Or something like that. More importantly: good luck with all your big changes. How exciting!