Hi how are you? I kind of know what you are going through. You are giht, no one seems to understand how a person with bulimia feels. I think you are very brave to have had the courage to tell your mum and a teacher....I could never have done that.
You say you are scared to talk to a counselor...That is totally understandable. In fact, your counselor might even know that and not exoect you to talk about it openly. What you might want to do is write it in a note and give it to a counselor. Or ask your friends to be there when you see her.
You say your mum knows- is she doing anything about it? Maybe you should tell her that you want help and you are scared of the problems bulimia brings...It certainly brings many. Especially other than verious health problems, you feel alone and helpless in the struggle to be thin and this pretty much takes away your life.
You will gain weight with bulimia...Once you start puking, your body absorbs the calories you give it faster before you puke and retains them. Bulimia is not the way to lose weight.
I think you are well on your way to recovery by just asking for help. Take good care of yourself and keep me posted on how you are doing.
If you ever want to talk, just pm me, I am there for you.