i feel the same about myself as well. When i am with people i smile a lots, and people thought that i am cheerful person. But when i am alone, i just a totally different people. Seeing my smiling photo makes me feel like i am just a fake person when i am in front of others. I used to upload lots of my photo on FB (i smile on almost every picture) but recently i deleted them all.. seeing those picture only a constant reminder of how fake i am.. and these days, i avoid being in the picture.. the real me is just sad lonely person who can't even smile..