IMLH- don' t waste your time attacking TBMOM.
What does come over in your posts is that you are very defensive, lash out at people who seem to hit a nerve, and have some kind of issue in your relationship with your boyfriend which you seem to ne ignoring- or at least pinning the food issue onto. Maybe you need to look at your relationship withhim as well as your eating?
I don't know you at all- but from what I have gleaned on this thread, you seem to have many of the personality traits of "classic ED material" if there is such a thing- very intelligent, academic, highly strung,( ie lashing out at TBMOM) possibly a perfectionist, very controlling, looking for help ( why else come to MN when you don't have children yourself and expressly don't want them?), but not willing to accept most people's advice anyway.
I'd say- quick judgment here- that there is some area of your life where you feel very insecure and unsure of yourself, or at least unhappy.
For you, eating is a form of exerting control over your life ( and others in your life.)
Behind the "am I too thin to menstruate?" question, which is a bit of bluff really, as your period was 3 days late, FGS, is the real question "DO I have an eating disorder?"
Please take note of what most of us are saying.
Maybe as well as using MN you should also seek from a forum for ED- ask your questions of them state your case, and see what responses you get back.
At least try to eat healthily, which is what others have said- have a proper breakfast, snack before lunch, proper lunch with protein and veg/fruit and the same for dinner.
But at the same time, I'd suggest you take a long, hard look at your relationship with the man in yourlife, any previous relationships you have had, your relationship with your parents, and any pattern that exists there. Therapy might not be a bad idea.