Bottomhole
I met a guy on BBRT who I had been talking to for months and thought had made friends. He introduced me to my first and only chemsex session, which was fantastic. Actually really liked him and thought he liked me. Just today I found out he was poz when he claimed to be neg(i believe he was the guy who infected me) and in addition to this he still advertises that he's negative. I feel really hurt and let down right now, I really thought he liked me and I could trust him. Anyway, for that reason my answer would be that you absolutely can't trust anyone, even if you think you know them. And while I know it's a hot fantasy for a lot of guys here, being deceived in that way really hurts. I wouldnt wish that pain on anyone. So you should probably just assume everyone is a liar.
Not blaming you, because in a near-perfect world such as the one we live in, nobody makes mistakes and everyone lives on clouds, eating dew, sunshine and gum-drops!!! (snark fully employed here) If you want someone to be TOTALLY honest with you, you have to invest the time to get to know the person. If there is to be an investment in the relationship, then people are more likely to be honest, but even that isn't guaranteed. There is nothing wrong with being a slut, because we all are, or were at some point, otherwise we wouldn't be here on this site. But it sucks to be lied to. On the other coin flip, would you have fucked him raw if you know he was poz? From your reaction, I don't think you would have. If all you were expecting from this person was a dick then don't be surprised when he does act like one. If you like someone, then invest time in that person, and get to know the good, the bad and in most cases, the ugly. Then make your judgement. But - move on, you have the rest of your life to live, and that is the important thing.