Unknowingly or knowingly?
Crazy story: I met this guy and I really liked him and I wanted something to happen. After talking for a bit, we decided to meet up. We just hung out and met at a public place. We hung out more and more and afterwards we started to make out and do things. After one incident we stopped speaking to each other. But after a while we developed a friendship, and one day while I was at his house I found an HIV pamphlet at his house and jokingly asked if he had HIV and he said yes.
Obviously to say the least, I was pretty furious. He later explained it to me and told me that he knew I was "young" because I "didn't know anybody with HIV yet" and that he didn't tell me about it because he knew that he couldn't transmit it to me.
My take on that was that he was irresponsible and thought he could control his disease and took a risk with my life and possibly other people's lives as well. I think it's disgusting if people with HIV choose not to tell their partners that they are infected and decline giving them the option to choose if they want to continue with intercourse or not.
EDIT: This post sounds like an HIV coming out story.

I didn't contract anything from him in the end. We didn't have even have sex. This was a year ago.