I agree with Sannah. Talking about your feelings of loss with your new T will help you move past it. I talk about my old T with my current T a lot; I especially did in the beginning, since I really, really missed him. That waned for a while and then when my mom died, my longing for T1 reared up again.

It did feel a bit odd talking to T about my previous T and I told him that. he said he didn't mind at all - if it was on my mind, he wanted to hear about it. He helped me through and continues to do so.