I show no signs of any symptoms of an STD, but my boyfriend whom I have been with for almost 6 year, with about a six month break between, where I had two sex partners, says that his lower back hurts, there is a pain in his abdomen, and it hurts when he pees. For the majority of my sexual encounters, I used a condom, but even when I did, I developed two UTI's when with one partner. My concern is, would I possibly have an STD and may have given it to him? Or does he simply have a UTI?