how when someone u r living with do not know that u are unhappy!

have not been having sleep, real sleep! Stress about the new job that i don't have a clue about! Don't know whether is it my cup of tea? Whether i'm doing it b' cos i want it or somebody else wants it??? F... is this life? Is this the life i want? I really asked myself sometimes whether i really like my life right now? or is it b'cos i have no choice? How can i tell a person right to the face without hurting them that i don't enjoy my job? This is not what i want? I don't see it in my future!!!!!!!!!!!!!!! Stresssssssssssssss!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!