DearSugar and Trusting Tessa need your help. Her boyfriend of one year found out from a voluntary screen that he has an STI [1]. Since she has a clean bill of health, her only assumption is that her boyfriend cheated on her. He denies her accusations but her friends are telling her she's being naive. Since some STIs [2] can go undetected, who should she believe?

Dear Sugar,
On my first anniversary with my boyfriend, he got the results back from a voluntary medical checkup, which revealed that he had the STI, Chlamydia. He swears that he has never cheated on me but I have a clean bill of health. I was furious initially, but after talking things through and doing some research, (Chlamydia is known as the "silent infection") I decided that I trusted him enough to believe him. However, a couple of my close friends don't buy his innocence, and I must admit that their reasons make sense, especially since we were maintaining a long distance relationship for a few months, during which anything could have happened.

I have brought up these issues with him but his story never changes. My questioning has hurt and upset him as I had earlier assured him that I trusted and believed him. This whole thing has sparked off a series of fights in our peaceful relationship and I'm extremely upset. I know that he wouldn't hurt me, yet logic and my friends are telling me that I'm being stupid and naive. Are these doubts valid, or am I just being unnecessarily swayed by people who probably don't know him the way I do?

Source [3]