Need your opinions please.........I am confused

Hi everyone, please i need ur help..i' ve been with
my bf for almost 5 months now, i really enjoy
spending time wit him, but i just find out while using
his best friends computer that they both have been
talkin bad about me, how he wants to use me..just
for my money, have sex wit me..then later dump
me.. i' m really happy i found out about wat kinda
guy him and his best friend are, so now..i' m turning
the table, he doenst know that i know about their
plan.. i wanna use him until he go broke then dump
his ass.. wat do yall think?