I wish I was waif thin
I am very curious why you care so much about being "waif" thin?
I don't want to be a fatty.
Wanting to be a certain weight is everyone's wish sometimes. Never get overly thin, it will cause health problems. But you can maintain a healthful diet by watching what you eat in moderation.
I think I'm doing fine already.
If you're doing fine then that is good, and I applaud you for your efforts. I do hope you're not obsessing about your body size and still plan on eating and drinking healthy foods that will not make you malnourished.