Hi Brandon,
Everyone has given you really good advice. Calling up a psychologist and making an appointment might be where to start. You really do need to talk all this through with a professional.
It seems to me that when your mother moved away, that was when all this came to the surface. You may be feeling guilty that you shunned her, and also you miss her.
Have you thought of writing her a letter? If you dont know her address, still write the letter and keep it. Write from your heart all that you feel deep inside and what you would like to tell/ask your mother. Dont stop writing until you feel you have said everything. This can be very cathartic even if it doesnt get mailed. You are 17 now and have grown up to know that you were just going along with your father and brothers because you didnt know any better and you trusted them. You were only 10 so you couldnt have understood what was going on. You say your mother was very loving. I know she would not hold that against you.
This is a start, Brandon. You are uncovering pain that has been buried and that is a very good sign. So first, make an appt with a psychologist. If you dont want to do that right now, then write the letter.... for you, Brandon.
I hope you stay on the Forum. The members here are wonderful people!! Talk all you want!!
With Best Wishes,
Gentle Sun