It sounds like the feelings you have for your therapist were never worked through with her and understood. Is there any way you could go back and see her, or if not see another therapist? If the feelings are this intense that you can't move on it suggests that more work needs to be done on understanding where they are coming from and coming to terms with what they mean and transforming them into something positive for your life. If you can't see your former T then it might help to see someone else and work through them there.