Boyfriend Tests Positive for Chlamydia, Denies Cheating

My boyfriend and I have been together for a little over two years. He’s in the military and before anyone jumps in with “all military men cheat,” I’m not trying to hear that right now.

On February 5th, he told me he tested positive for chlamydia. He was very calm about it. I work from home, and he came into the office and said, “I need to talk to you when you have a second.” I finished what I was doing and went to talk to him.

He said, “So you know how I got tested today? Well… I tested positive for chlamydia. Did you sleep with anyone while I was away?”

I was shocked. I said, “Oh wow, omg. You tested positive? How? No, I did not sleep with or kiss anyone while you were away. Did you sleep with anyone? Because I know for a fact I didn’t.”

He said, “No, I would never sleep with anyone. I was deployed and working the entire time. I barely had time for myself.”

So now I’m sitting there thinking… then how is this possible…

I told him I’d go get tested immediately, hoping maybe it was a false positive. I left work early and got tested. Two days later, my results came back: positive. I have chlamydia….

I’m in shock. I’m crying. I’m overthinking. I’m trying to find any possible loophole, any explanation for how this could happen,,, but the truth is, there is no way this happens without one of us cheating.

TIMELINE

He was gone from September 2025 to December 13th, 2025.
I got an IUD on November 20th and had STI testing done that same day everything came back negative. So the only “window” where I could’ve supposedly hooked up with someone else was the three weeks between that test and when he came home.

But during that time, I was visiting my parents for Thanksgiving. When I came home the week of December 8th, I was working and preparing for his arrival. I learned how to make butter chicken for the first time for him, made a welcome home sign, I cleaned the whole apartment I was so excited.

He came home, and obviously we had sex. A lot. Everything seemed great until December 29th, when he said he could feel my IUD poking him. The doctor had told me that was normal, but then he said his penis was swollen and hurting a little. That was weird, so I messaged my doctor.
I told the doctor he was having irritation after intercourse, discomfort, itching, and that he felt a poking sensation. I asked if it could be related to my IUD.
Doctors response:
The poking sensation is likely from the IUD strings, but the irritation and discomfort are probably not related.

At the time, I didn’t think much of it. But now, typing this out, that was a very clear sign of chlamydia. I got my IUD removed not because of him but for other medical reasons and switched to Nexplanon. He didn’t mention any more irritation, and I didn’t have symptoms, so I didn’t even consider cheating back then.

Now we’re here. Both of us tested positive. And I’m losing my mind. I’ve researched. I talked to my doctor. Every single explanation leads back to the same conclusion: he had sex with someone else.
I told him this. I said, “Please just tell me the truth. I won’t be mad. I just want honesty.”
He said, “I’m telling you the truth. You’re the only person I’ve had sex with in this relationship.”
That phrasing didn’t hit me until later. He’s the type of person who avoids “lying” by being technically truthful. Saying “in this relationship” instead of “in general” is… suspicious idk just a random thought.

He left yesterday for training. He’s supposed to come back Friday, but he could deploy again at any moment. So now I’m home alone with all of this.

He keeps saying we can go to the doctor together and ask how this is possible if neither of us cheated. And part of me thinks, “If he’s willing to go to the doctor, maybe he’s not lying.” But realistically, he’s just clinging to confusion because it’s safer than admitting the truth.
I know he’s lying because I know I didn’t cheat. But he won’t admit it. I don’t know how to get the truth out of him. I just want him to say it so I can stop spiraling.

He’s acting completely normal! He’s talking about our future, being loving with me and this is all normal we always are loving and talk about our future and goals. But all of this is making me feel insane! My heart hurts. I’m confused. And now that he’s gone, I can finally think clearly without his actions convincing we’re okay.

I’m planning to start packing my things and move back in with my parents. But I feel like I need him to just say he cheated so I can feel some kind of closure.

I don’t know what to do.