For me I have found my anxiaty goes up when I miss a session (or more) I don't feel abandoned, I understand that she has a life, but that understanding doesn't make the anxiety any less. What has worked for me is to show up early for my session and just relaxing and trying to let go of the anxiety in the waiting room (I'm always alone there) knowing that I will be seeing my therapist soon, and she is right behind that door, helps to get rid of the anxiety before the session starts.