If you are not with him while he is out on his binges, how do you know other than his word he is not cheating? Marijuana and cocaine are drugs and severely affect your ability to make decisions. And for some people, the drugs are sexually stimulating. How do I know? I was married to a cocaine addict. And I was around it a lot also. I am not saying that it is impossible for your boyfriend to stay committed to you but don't be naive. If he is into the party life and you are not, it is a lost cause. Marijuana and cocaine are drugs that are most enjoyed socially. That means women and men would be together. So, the drugs are most likely not the only things being shared.
Chlamydia is only transmitted sexually. ONLY sexually. Your boyfriend needs to be tested and treated if he has it. If he has it and you continue to have unprotected sex with him, you will stand a chance of getting it again. And that can potentially affect your fertility in the future.
have you been going for regular yearly exams ? what led to you being tested?
you only get chlamydia through sexual contact. It's not something you get any other way.
grace