Do all vegetarian have to maintain a healthy diet?

since i have been a vegetarian(2 weeks) all these "meat eaters" are telling me i'm not just because i'm not maintaining a good diet. okay i eat cakes,cookies and cheese fries here and there but that doesn't mean i'm not a vegetarian does it? if it doesn't contain any meat in it a vegetarian can eat it right? i didn't become a vegetarian to maintain a diet i became a vegetarian because i will no support animal cruelty. don't you just hate when "mean eaters" tell you you aren't a vegetarian?