It may be the right move to call the guy and let him know about your status. Also with the risk of unprotected sex, you may want to make an appointment to get tested for other STDs. I do hope this doesn't scare you and remember you are not alone. We all have made mistakes but in order to give yourself some peace and sleep at night, just make the move.
I know it's scary but keep in mind Herpes is extremely common and it 's manageable. I have Herpes Simplex 1 in the AREA 51 and it was hard for me to explain to my boyfriend but because I was honest with my partner, he didn't bash me about. As a matter of fact he's been quite supportive and we gathered as much information about Herpes as we possibly could.
Not to mention my OB/GYN gave us more information we could handle including antiviral drug information and ways to reduce and suppress outbreaks. His doctor also armed us with material and mentioned wasy we could have a healthy sex life.
I'm not sure which type you have but please just be honest with him. Let him know. You made a mistake but don't beat yourself up about it, just be smarter, tell him the truth, get yourself checked and take care of you. YOU ARE STILL A BEAUTIFUL PERSON JUST LET HIM KNOW.
If he hears you or not at least you know you did the right thing.He may be mad but he can only respect that you told him
Stay strong and also stay smart. Keep in mind there are wonderful websites to meet people who have H and I'm positive you will meet someone who will love you regardless of Herpes. Herpes doesn't make you. It's just a small part of you.