It is not a smart move by your therapist as she will always know more about you than you will about her, will always be in that "ahead" state and her having done therapy with you doesn't go away, even after two years. Relationships after Therapy: Why They are Always Bad - Shrink Talk

As much as you would like to be friends with your therapist, I would think about what your therapist would gain from such a friendship with you? Friendship is not just about liking one another.