Yes, I think it means she thinks of you. Think about people you think about -- whether you like them or not. There are "triggers" to thinking about them, things you have shared together in your relationship, just the two of you. I once had an online friend in a forum like this who would overdose on Tylenol and we were thinking about how to help that and I suggested that she overdose on grapes instead when she'd get mad -- eat 100 grapes instead of 100 Tylenol (which landed her in the hospital). Well, next time I was at the grocery store, I saw the grapes and guess who I thought of? We'd laughed at overdosing on grapes (don't know if you've ever eaten too many, it's not fun but the thought is funny) so I smiled when I saw the grapes, thinking of her and our relationship, etc.

Therapists are like our friends, relatives, families, etc. and have connections and relationships with the people in their lives and we're one of those people! When we think about actual characteristics of people in our lives, remember conversations or experiences we've had with them, that's because they are part of us, of our memories and mind. Be careful though, we can make stuff up, wish and imagine stuff and that's not the same thing. Imagining what you think it would be like to live with one's T is not the same as knowing T's favorite color is blue (my T's favorite color) and thinking of her when you see something lovely in blue.