Why is my fiance like that?

in response: about the picture there was a lie b4 about it he claimed the pic that i saw was his friend in usa but eventually came out as his fling in austraila to add up its not only pic. that he has but their numbers to and also i found a box of letters from the ex.. different ex.. and yes i wouldnt know everything bec. he just lets me stop studying and just stay home. and i also saw in a print out an email of his friend claiming he has a daugther which is not 8 years old or something which he denies as well as his family. and yes he gets physical when we fight!