How to tell my partner I have Chamydia??

I recently had my first annually Pap, and I got a call that I had Chamydia. I cried like a baby, I felt so disgusted. The real problem is how do I tell my partner I have it? We got back to 3 months ago from being apart for so long. I just don’t want him to think less of me & end up leaving me for having this.