it's transference, and yes it's perfectly normal. I've talked with my T about this a lot. She says it's especially understandable if you've been working with T a long time.

The reason I think it's transference is because you're not friends with T, but if you are fond of T's qualities, it can show you that you can find those qualities in other people. For instance, I remarked to her a few weeks ago that whenever she calls me, I immediately get homesick because her accent is from where I used to live. I told her that I think that means I need to talk with old friends/out of town friends on the phone more.