I relate a whole lot to your post. Our precise family dynamics are different, obviously, but I also have looked up to teachers (and other mentor type relationships) as mother figures from a very young age. I would get very attached to the point of getting hurt. Now I have the same problem with therapists.
I don't feel safe seeing a male therapist, so I see a female therapist. Something that has helped is seeing a young therapist. My therapist is only 30 (I'm 20), so it's more difficult to see her as a mother figure since she is only 10 years older. I still have some transference, but it is not as bad.
Sending hugs to you, friend. Feel free to PM me if you ever need anything or want to talk.