Most Helpful Guy
That doesn't sound healthy (either physically or for the relationship). You must be getting the infections from somewhere, he needs to get tested, and until he is clear do not have sex without condoms (as others have said, no condom, no sex). It doesn't matter that he hasn't slept with other people in a while, as STDs can persist, most of them indefinitely unless treated, it is not a sign of cheating. If it is affecting your life and causing you pain that is a huge issue, and one that needs to be fixed.
Most Helpful Girl
DUMP HIM WTF. U literally got infections and stds from him and he doesn't give a fuck. He doesn't care for u like a boyfriend should. U tell him you hurt and he can't slide a fuckin condom on? He's an asshole. Get out of this relationship he doesn't respect u one bit.