Zapakh zhizni (2007)

This is a tough love triangle story, but not just cheating. Here, love coexists alongside death, and real life is intertwined with mysticism. And you still need to figure out where what is happening is reality, and where is just a figment of the fantasies of the protagonist. A young man is constantly on the verge between life and death, love and friendship, morality and immorality. An endlessly painful choice.