i rarely do "meals" myself. i think of a meal as a hot orgy of 3-6 mixed things on a plate.
i do servings, usually cold ones. yes i eat some veggies too. i do low carb (ketogenic), 1000kcal average per day, since 5 months and have lost 42 pounds so far. 16 more to go. it's awesome. not sure, if it has yet increase my insulin sensitivity, though. i "feel" that diet coke might me a problem in that regard.
Only if you're vegan, and even then just barely, and even then there's still lots of carbs.
Even with the risk of diabetes? If carbs are no good to you, I would suppose the school needs to get you food that you can eat. Maybe you need to get some paper from a doctor saying that you need special diet...
I wouldn't be taking medical advice from the internet - no matter how knowledgeable the people giving the advice, they still don't know you in person. Go see a doctor if you're concerned. He/she can give you advice on a suitable diet for your needs.
And yes, there are such things as INTPs who overuse emoticons