If he IS bipolar he cannot be a sociopath. Also the bipolar would explain some of his risky and manipulative behavior if this happened in a manic or hypo-manic episode. If he feels ANYTHING (pretty much) he is not a sociopath. If he feels empathy, guilt, remorse, or anything similar at any time he CAN'T be a sociopath. If he is nice to you and cares about you, he's not a sociopath. Sociopath's don't have friends. They have pawns and prized possessions. People aren't people to them....

The reason sociopath's do dangerous things is because 1 they do not care about safety AT ALL. Nothing really bothers them. They get into risky behavior because in order to FEEL highs at all they need to get a rush. They only happen with this we would consider an extreme high.