STD Notification 😩

"Hey I was tested at my birth control appointment and it came back positive for chlamidiya?"

Is this okay to send to my fwb? I've never been in this situation before because he's the only one I've ever been with. I usually beat around the bush with things but that message is straightforward; do you think it'll make him mad? Do you think it'll backfire on me if I'm honest with him? I'm just nervous about how he'll react.

Its just that I know for sure that it came from him. I haven't been with anyone else but he currently has multiple partners.

I wanted to send him an anonymous message through stdcheck's website but you need the persons email or phone number and I only have his Snapchat.

EDIT: If say it's not from him that would be admitting to sleeping with other people and I haven't. I haven't kissed anyone, I've barely hugged anyone since I first met him last September

@cheyenne He knows he's my only because we had a conversation about our sexual history before sleeping together. I didn't sleep with him right away, I built a friendship over a few months so the trust was there. He doesn't doubt that he was my first and he was very patient and sweet about it. I'm not going to lie and imply that I've slept with other people. If that makes him defensive and he decides not to get treatment that's on him not me

Edit #2: Thanks everyone, I'm going to go ahead and let him know. And you are right, I should've been smarter about protection. Just to clarify, I am angry and sad but at the same time I don't think he knows he has it and I definitely don't think he passed it to ms intentionally. I'm going to post an update (probably tomorrow) and let you know how it goes