Sometimes I just cannot understand....

I have been wondering how come there are people who like to backstab behind you.... I just cannot understand. I feel like I am wearing a mask to work everyday... N i am getting tired of all these.... Its a sad thing to know that people whom u used to be very close with backstab you.... Is working life really like that??? I wanna to leave that horrible workplace but I dunno where I can go to now... Last nite, I just cannot control myself anymore... I broke down n cried.... I simply cannot get over it... Everyday I am praying for a better day... But I wonder will my days get better????