Why do I keep eating and eating and eating?

I feel like an obese person. I don't even eat due to my hunger. When I start on eating something, I don't even stop. I have to feel that urge of extreme fullness to stop and that feeling usually occurs when the food is finished. I eat so frequently and so much every day. Like every single day. I live alone so I don't feel any shame. I am only ashamed when I am with someone. I feel like a pig and I keep gaining weight. I puke most of the time. I am scared of getting diabetes. I look at skinny people to trigger myself but it doesn't work anymore. I used to starve myself, now I can't even wait for 2 hours to not eat something. I hate this