Hi,
I realise how hard it must be for you right now; not only are you grappling with the realisation that you have a problem with food, but actually taking the step of asking for help is massive as well. I think possibly this is for two reasons:
1)You feel like you're not worthy of anyone's help, and that they will only think you're an "attention seeker" for actively asking for it
2) You are feeling frightened at the prospect of letting go of what has become the norm for you and possibly having to gain weight.
I can understand how this may feel, but what is really important is that you act now, while you are in this more rational mindset. I think the best thing you can do is confide in a friend and ask them to go to a doctor with you. Going to see a GP is the first step- and please, try not to think too hard about the end result. I realise this is hard to do, but the most important thing is to understand that by taking this first step, you will not automatically be committing to gaining weight.
Going with a friend is essential, as you need that support. And remember- you are NOT an attention seeker, you really need this help and if you were an attention seeker, chances are it wouldn't even have occurred to you that you didn't deserve the help.
Good luck, i am rooting for you