Ive been with this guy and.....?

Well were only friends with benefits because well hes moving soon and I talk to other guys he alks to other girls and well hes starting to go clubing and he says hes carefull about stuff like that and nothing scares me more then getting an STD and well if hes banging some druken skank and gets something hell give it to me ..... He says hes careful should I believe him?