I have an eating problem!?!

Okay so about 4 days ago, I got better from a cold I had. It wasn't that bad, my throat just hurt and my nose was stuffy. But whenever I'm sick, I don't eat much. But I have a very fast metabolism so I eat more then most people. Well, after I was done being sick I still wasn't eating. I rarely eat anymore. I used to eat about 4 meals a day but now I only eat one meal a day. Sometimes I don't even eat a meal, and if I do its me forcing myself. I never feel hungry, but my stomach does growl a LOT. Like yesterday, I ate one meal but not even the whole meal. I couldn't eat it all. I always weigh 111 or 112. But now I only weigh 106 or 107. I don't know why I'm never hungry. Do you have any idea what's wrong with me? Oh and I'm not depressed at all, I'm very happy.