How to tell someone I think I have a eating disorder?

I have been struggling with food since I was 9 years old. I used to be scared if I ate then I would choke and die. I was always scared every time meal time came and I would anticipate it all day and start crying and shaking just looking at the food on my plate. I would hide it in my checks then spit it out in the toilet and I would take toilet roll to the table and hide my dinner in there and put it in my pocket. I got help and it slowly got better then about a year ago a lot of crap happend in my life and I went on a diet to lose a little weight but as soon as I started I couldn't stop I became obsessed with counting calories and exercising and finding new ways to lose weight. I started restricting how much food on my plate I could eat. Then I stopped eating breakfast and lunch and only eat a small meal at dinner time. If I eat any junk food one day then the next I starve myself. I look at my stomach in the mirror everyday especially after every meal. I get up in the middle of the night and start exercising to help lose more weight. I like the way that I can control how much food I eat it make me feel good. If my stomach is full I feel disgusted and can't stop thinking about it all day. No matter how little I have on my plate I will section it off and only let myself eat a limited mouthful. All I think about 24/7 is how I can eat as little as possible and how to lose more weight. The only times I do force myself to eat is when I feel so weak and that I might pass out so I eat a little but just enough to not feel dizzy. My family has started saying that I look really skinny and question me on food but I just blow it off and say am not a bit eater. I think they just think am obsessed with being slim. They don't think or have any idea how bad it is. I want to tell someone but at the same time in my head I don't think it's that bad yet so why should I worry then. No one ever really notices how little I eat. But I have been reading story's online about people dying from ED. I don't want that to happen but I am scared to tell. I don't even know how to start. I was thinking of writing a letter and giving it to them next week but what if they laugh. But maybe am not that bad maybe am just on a strict diet should I just wait. ?
How to tell someone I think I have a eating disorder?
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