I feel so confused, and lost.

Thank you, but how is it possible that I just randomly got it and he doesn't have it? Thats what confuses me. 

Were you virgin before being intimate with your boyfriend,?

No but the last time I had sex with someone else was 3 years ago, I've had std tests since then and they all came back negative for everything

I'm a guy. If my girl friend, wife, etc. told me she had  Chlamydia. And I knew without a doubt I did not have it  I'd leave her in a heartbeat. You may be inocent but if you were in his place would you believe you were faithful?

There are several ways you could have contacted the disease. One major way is toilet seats, especially public restroom toilet seats. Have you used public restroom lately? If you answer yes to this question, then it's a great chance that it was how you picked it up.

To prevent a repeat, ensure to flush the toilet before use and wipe the seat and flush again. Then roll some tissue paper into it to minimize splash. Lastly, place seat paper over the seat; double it if you have to. If there's none, make improvise with toilet tissue. If you practise these hygiene tips and wash your hands thoroughly after using the restroom, you'd greatly minimize chances of inexplicable STI.

Make sure to mention this possible mode of transmission top your boyfriend; I'm sure it'll make so much sense to him. Believe it or not, one could pick up infections from toilet seats, behind other users, if one doesn't take those precautions. I hope this clears your puzzle.

Your assumptions might be wrong. Just as I just explained to Marl, one easy way to pick up inexplicable STI is failure to practice hygiene while using public restrooms. If you don't cover the seats as I suggested, it could happen to you.

Sexually transmitted diseases, especially bacterial type, are not only transmitted sexually. Poor hygiene practice in public places especially could increase the chances.

I understand you but you have to know many people have stds without symptoms and they may not know it, and some could have them but they are innocent.

She could have contracted the disease through public restroom seats if she uses them as she does her personal restroom(s). In fact, I could say with great certainty that she contracted the disease that way, not necessarily through promiscuity/cheating.

Yes I've heard that too, but I'm not completely sure about it.

It's possible only because bacteria can live outside the host's body for so long (the ones that form endospores - mainly Gram-positive - can last for decades, even centuries), unlike viruses that don't have much of a survival chance outside their host.

That's right man.

What about hpv and genital warts?

HPV might not be transmitted that easily because as I'd said earlier viruses are thugs in the body, but outside the body they're just as vulnerable as any wimp out there. Warts, on the other hand, could very easily be transferred from contaminated surfaces to mucous membranes. But one effective way to reduce chances of transmission via mucous membranes is by paying particular attention to hygiene practices.

Thanks a lot bro.

I have other questions, I will ask them later via private message.

It's always a pleasure, bro.