Hello, Welcome to HCM, There are many sexually transmitted disease, caused by gonococci, chlamydia, trichomonas, syphilis and herpes infection. These are the most common organisms causing sexuallly transmitted infections, the clinical symptoms, signs and laboratory investigations helps to detect the presence of sexually transmited infections. If your boy friend is suspected to have STI, there is all possibility that he may transmit the infection to you. He should be evaluated for the presence of any symptoms like burning micturition, itching and any discharge from the genitals and the organism should be found out by lab investigations. Thank you.