I could have written this. I actually have a thread about this and transference on here. I know how painful it is to have that wish that your therapist was your mother. I know how it can eat at your core. I am sorry you are going through it as well. Please know its totally normal to feel this way. Your therapist is probably giving you something you never had and treats you good and you realize you have never felt this way and you never want to let her go. How can you not get attached?

One of the best things I did was tell my therapist these feelings. Its very hard. In my case it hurts me to just look at her. If she knows how you feel she can help you to work through these feelings. My T really gets my pain and she is helping me with these feelings. They are very intense for me lately. I am going to have to talk with my own T more about this because its really effecting me. Another thing that helps me is to be happy for the role she does have in my life even if its not the role I desperately want her in. I feel like through therapy she is "mothering" me in a way. Therapy still feels very healthy and professional.

I do hope you can work through this with your T. It might be hard but it really helps for her to know you have these feelings.