My boyfriend's ex was rumoured to have genital warts. i couldn't see any physically on his genital area so could i still get the std?

Yes: Your partner can have hpv on his penis, as the warts that the hpv forms can be extremely small or it can infect the tissue without forming a wart, so if you were my pt. In coral springs, fl, i would do an hpv culture of the cervix- that will detect the virus even if the pap is normal and i would inspect the vulva with a colpolscope to see if you have an small condyloma which u may or may not.