Even though I like my T a lot, I would not feel comfortable as her friend. I have been too vulnerable in front of her. I would feel awkward. It would always remain unequal.
Try to imagine you meet your T at street, now or later, and T invites you for a drink or coffee - I would be so happy that first moment, but you know, once you sit down, what would you say? Not in that safe office, not only talking about your problems, but having a 'real life' conversation. I really cannot even think about it without getting nervous.