I'm going to describe my situation. I know it's going to sound extreme, rightfully so, but I want you to tell me if it sounds like a mental illness or not. I don't know if I'm safe to talk about it with my family or friends for advice.

I am taking the Christian Bale approach to muscle lose by starving myself (see: The Machinist). This means my calorie intake is always less than 500 a day, sometimes even 200. The goal of this diet is not to lose weight. Instead, I want to lose unwanted muscle in my legs to look better in clothing I already own. Because starvation is practically the most effective way to lose muscle, I have started depriving myself of food. My daily food intake usually consists of one apple, vegetable stir-fry, bits of dried fruit, black coffee and a LOT of water.

I'm 5'7" (152.4 cm). I weigh 130 pounds. My BMI is 20 (normal), meaning I'm not underweight. I know that I am not fat. But my legs are objectively large, too large for my liking, due to the muscle I have gained from exercise on a treadmill.

So, what do you think? It sounds extreme, but does it sound like a mental illness? If it is, what should I do?