my fiance is cheating on me??

how can trust be earned if he cant share his pwd wit me!? at first i just wantd to see if he wud give it right away but when he denied it .. it made me think!

i dont have any interest reading every lil thing but want to be sure if i m not being cheated nd hes just marrying for the greencard cuz hes in PAki nd im in the USA!