Sapphire, I can sympathise as I've kind of felt the same since I arrived here (Nov 12).
I have put up such a brave face, happy/smily etc that when I finally broke and admitted that I was miserable and wanted to go home people were so surprised! I actually made myself ill through all the pretense and am losing my hair
I hope to god things get better when you get home (leave in March 13) otherwise I don't know what I'll do, I am in some serious funk at the moment.