My BMI's just below 19 but I desperately want it to be 16 or under. I've had anorexia in the past, but I can eat now, so it's not like I have an eating disorder. Food still preoccupies my thoughts though, all the time. I know about bulimia but I feel ashamed saying I have that, because people with bulimia are ill, and I don't feel ill, I just have habits of making myself sick after meals and using laxatives to make up for occasional binge eating. I don't want to go and see anybody about "bulimia" because I don't want to waste anyone's time, and I know that when people look at me they think I'm fat, so they wouldn't believe me anyway. I make myself sick if I eat a normal size meal, it's not just with bingeing. Every now and then though I wake up and can't stop thinking about food until I eat, and need to binge. It's like I lose control when I eat. I'll be thinking to myself "I'll stop in a minute" but it seems impossible, it's like I lose control. I don't know what to do, I've tried to stop so many times but can't. It feels like it won't ever go away and it's pushing me towards the thought of suicide. Is it normal to feel like this? I'm 18, I don't know if it's just some insecurity thing at my age.

Good luck.
You should talk to a doctor because what you're doing is not healthy.
You really shouldn't want to be any lower as it can lead to osteoporosis. Even though I'd like to lose a few pounds I would never be sick coz I like my teeth. The acid from your stomach erodes your enamel which is why your dentist is the first to notice you have bullimia. But when the enamel is gone you can't repair it.
You are probably just perfect, so eat healthy food and smile - with your own teeth (for the moment).