She probably is in denial then. That can be a delicate situation, and it'd probably be best that you go to therapy first and have someone who has diagnosed you and have your mom come in to discuss it. It'll leave her little room to back into denial or make up excuses. At the very worst, she might think the therapist to be a quack, but she is eventually going to have to come to terms with it, as are you.
I think eventually we need to accept ourselves as we are. Some things we can change, and we can work on that, others we can't change no matter how hard we try. Perhaps that's something you could work on, I had trouble with that myself and now it doesn't bother me so much anymore. Sure, it doesn't take away the dysphoria or transform us, but there is some truth in having to love ourselves before we can love others. It's very difficult to live a life where you have a hard time accepting yourself or loving yourself, and in turn people may avoid you. It's not that someone else couldn't take some of the pain away, but I'd like to think that I'd want to be a little more secure with myself, and insecurity and can ruin a relationship of any kind. I've been on both ends of that.
The important thing is that it isn't your fault or anyone else. This is just how things are and so eventually you do need to move on and say, "Hey, this is how it is, I can't do anything about it. I'll just have to accept it and work on what I can do." and it doesn't have to be now or tomorrow or even in the next few weeks or months. We're all here to help you along as long as you're willing.