I have no idea what a wink would mean in this context, though maybe you can piece it together based on how she is in person?

What you wrote to her and asked is so complex and vulnerable that it would be very hard for a therapist to reply to if they typically only send short responses. In all honesty, I don't think a therapist could possibly feel the same way a client feels about the relationship because they are not exposing themselves and being vulnerable, so their feelings are going to have a very different quality. It's not a bad thing. Just different for them.