Bisexuals go from authentic, passionate love to suicidal sexual wandering.
They rarely understand or experience what is typical in a long-term relationship. But some of them do try hard to have long-term relationships and they may experience them with little focus on sex. This doesn't seem to be the case with Boris. In his native Russia, homosexuality might not be illegal, but it still is considered a western perversion. At 34, he still tends toward the macho side of masculinity.