Call, why not? That was the deal after all! If my T told me that I could call, it would be too hard not to. Here's the thing to keep in mind though... it is true your therapist can never be your friend, they will be a different person if they are your friend, a non-therapist person you haven't met yet. Therapy is a one way street, but friendship is give and take. In therapy you can email harass your T as I do, unload all your problems, ask for advice several times an hour, but most healthy friendships don't roll like that. In a friendship the entire roll of each of you will have to be different. If you go to coffee or something consider that. Maybe you could develop a relationship where you two meet up once or twice a year, but I would be very careful not to fall back into the old pattern of the relationship where she is the one comforting you.