I think good Ts always think in terms of "do no harm." While it feels disappointing, I think she's actually looking out for you by such a limited response. I have no doubt she was genuinely pleased to hear from you. Give it time. If you are meant to keep a relationship with her, it will have to develop very, very slowly to allow you both to gain the confidence to redefine the boundaries. Too much too soon could activate some painful feelings for you, and she doesn't want that to happen. I think your feeling of containment is great--it's your attachment and trust and a sign of a good foundation. As extensive and long-standing as our communication is, both my T and I keep to certain boundaries--and that's ok.