Keeping an uninfected partner HIV negative is important but unrealistic worries can interfere with your relationship.
All evidence points to almost all people acquiring HIV through unprotected sex, mother-to-child transmission or sharing needles.
You will worry less if you know the facts about the risks of different types of sex. During sex HIV can be passed on in blood, semen, pre-cum, vaginal fluids and anal mucus; but not in urine, tears or sweat.
HIV is not passed on every time unprotected sex happens - although it might be passed on any time it happens. If a condom is not used once (or even a few times) it does not mean that the other person must now be infected. Both of you should talk to each other about what level of risk you feel OK taking.