I had this problem for almost a year. I simply didn't get hungry, and would really only eat when my sugar crashed. I've found that, with me, the less I exercise, the less hungry I am. If I work out, I have a normal appetite, but if not, then I just don't get hungry.
Try doing some small work outs and see if that helps? (Make sure you have the energy to do so and don't overdo it.)
Conventions for 2015 (so far...): Momocon, A-Kon, Otakuthon, Sac Anime
Cosplay line-up: Mayoi Hachikuji (Bakemonogatari), Nona (Death Parade), Nagisa Momoe (Madoka Magica), Menma (AnoHana), Tsukihi Araragi (Bakemonogatari)