Hi, bluedonna. I suspect you are still somewhat dealing with the divorce and the aftermath. Remember that your mom was likely going through a lot of emotional turmoil, too. But, yes, it would have been nice if she could have been there for you more. I didn't get greatly involved in my children's choices of schools in the sense of insisting they not go to any they wanted to. She likely assumed you had made up your mind and that you were happy with your choice. (I am sorry it didn't work out the way you had hoped, but nobody can predict the future.)
Yes, I think you would find therapy helpful in dealing with these issues. Also, be planning for the future, when you can move out. Okay?