why are you all so unhappy?

I was at chapel today and I went forward to receive communion. On my return from my seat I was looking around at the people sitting in the pews, and I noticed how few smiles I saw... I could count them on one hand. That depresses me, this should be a joyous occasion, it is the celebration of time well spent for our president, the graduates are being recognized and are being commissioned, and we have just taken communion and celebrated the life that we have in Christ through the sacrifice. if all of these things are good (like they are supposed to be) then why is everyone so unhappy? what's wrong? shouldn't we have smiles on our faces expressing the joy that Christ has given us all? shouldn't we be able to express the fact that God has been good to us throughout our time here and the fact that we are still here? what's wrong? why?