((((HUGS)))) Meg. I am so sorry your Mum is hurting you and letting you down. You are NOT useless or an inconvenience - one day you are going to be independant, and then your Mum is going to regret not spending enough time and doing things for you now. You need to focus on the future - you will not always be living in the situation you are in now.

You know we are always here for you if you need to vent.