Dreams are dreams. I got so I enjoyed dreaming about my T, those dreams were the most help for me as they were about my issues at the time. When I would dream about my T or my husband, I knew I was "safe" and it was okay to work on whatever the dream had actually been about.

The actions aren't necessarily what dreams are about; T's tend to follow the emotions, so your feelings when dreaming what you were dreaming could be much more important than the symbolism of your T sitting beside you and putting your arm around you. I dreamed I had my head in my T's lap (mine was female as I am too) and she was stroking my hair! That was a fun one to confess but better than the one where she and another female T I'd had in the past were lesbians on matching doorsteps of matching houses (they were both married mothers) as I walked by on the sidewalk below. But I recognized the symbolism there (I was working with disentangling my mother and stepmother from one another in my psyche) and knew it was not literally about my T.

Your dream made me think of how we sometimes think T does not want us, with her anxious to leave the next morning and your following her around; I would take the dream to mean you may think or feel one way about T but that T herself and her behavior (sitting next to you and putting her arm around you) is the "actual" situation. If it were my dream I would be looking at how I am trying to "get that feeling back" as if it is dependent on another person for its existence. It seems to me from your having the dream that you might have you a great therapist for yourself!

I would tell your T the dream; it is just a dream and very good "practice" with discussing something meaningful to both of you! That's what therapy is about and I think your T will be able to help you feel better and safer within yourself.