STI ๐Ÿ˜‘๐Ÿ˜‘

I have Chlamydia, My SO and I don't know who gave it to who , but he won't go get tested and get the treatment since he doesn't have symptoms. How can I get him to go to the doctor. We've been in a monogamous relationship for 6 months now. We both had partners a few months before we were together & we don't use condoms like at all.ย