My T changed behaviors and stopped walking me to the door, and it DID bother me, so I asked her about it.

She said that she'd gotten comfortable with me and didn't think that formality was needed. I felt like she was abandoning me...kind of a "don't let the door hit ya on the way out." We both just viewed her walking me to the door differently. I viewed it as support as I was leaving, and she viewed it as a formality. Once we talked about it and understood each other, I felt much better. I've told my T that now that I understand, she doesn't have to walk me to the door, but she always does so anyway, since she knows it's important to me.