If so, you’re not alone. New research shows that many of us may get more hot and bothered about brands than we do over our living, breathing pals. Scientists measured people’s physiological arousal response when looking at pictures of friends, loved ones and favorite products. Significant others fared well, eliciting more emotion than a BMW logo, while best friends and favorite brands ran neck and neck for affection. But buyer beware: Such devotion is marketing-driven and easily exploited by brands … that don’t love you back.