STD I need advice!!

So I went to the doctor to get my birth control replaced and I wanted to get tested because I hadn’t in awhile. I’m currently dating someone right now too and I did have a previous relationship before him, wasn’t a relationship more like just a fling.

I ended up testing positive for chlamydia and gonorrhea. I was so shocked because I had no symptoms. I had discharge but it didn’t look abnormal at all because it would come and go.

So now idk how to explain this to the guy I’m dating because I’m scared he is going to blame me but then again idk if he has ever been tested before me also. It’s really no ones fault but I’m just terrified he will end things with me. Any one been in the same boat before? And how I should talk to him

Thank you so much