I am HIV positive. Is it wrong for me to sleep with an HIV negative person if he knows the risk and wants to take it anyway?

One question to consider is whether the willing lover is making a sufficiently thoughtful and informed decision -- enough for it to count as mature, informed consent. We do not usually think of a teenager, or a drug addict, or someone in a rage as capable of mature, informed consent. Have you and your potential lover discussed the risks in detail, more than once, and at times of emotional calm? From what you have said, I can't tell whether you are considering 'safe' sex or 'unsafe' sex. The risks of safe sex are so much lower than the risks of unsafe sex, it is hard to imagine that it could ever be rational to engage in unsafe sex with someone who is HIV positive. Finally, and most importantly perhaps, you have some responsibility for the outcome of your actions -- even if your partner has offered mature, informed consent. It is not just he, but also you, who would be risking his life for the sake of sex. How would you feel if he contracted HIV as a result of your actions?