Look, every time you have sex you take some risk. YOU are responsible for your health, not the other guy. Yes, lying about your status may be a crime in your jurisdiction, but do you know how many guys *think* they are HIV negative and aren't? Even if you'd have shown up there with an OraQuick 15-minute HIV test, you could not really be *sure* that he hadn't gotten infected in the last few months. Short of locking a guy in a room for three months and then testing him, you can never be sure. So, if you want to minimize your risk, use a condom. You practiced "insertive" anal sex without a condom. This is a high-risk behavior, though decidedly less so than receptive. Chances are, you weren't infected. Chances are also, he's not the first poz guy you fucked and just didn't know it. It's too late now for post-exposure prophylaxis, but I recommend you get tested in three months and then breathe a big sigh of relief and forget about this guy. Lying about your status is a jerk move and would piss me off as well, but you are old enough to realize people lie to get what they want.