Chlamydia

My bf and I have been together for 2 years now and he just recently tested positive for Chlamydia. I never cheated and he says he never cheated. I tested in nov and came out negative. Is it possible he carried it from his other partners? He has had many gfs but never tested. He is upset with me and talking to me because he is accusing me of giving it to him. He won't even respond to my texts.

I really believe he didn't cheat on me.