Patient Privacy and Personal Boundaries

As a nurse in my thirties, I find myself often questioning the boundaries between professional ethics and personal desires. Recently, while taking care of a patient who is also my open relationship partner's friend, I found myself oddly intrigued by his vulnerability during a particularly intimate medical procedure. The situation felt like an odd mix of compassion and attraction, which left me wondering about my own ethical stance. Is it normal to feel this way, or am I overthinking things? What advice would you give on maintaining professionalism in such complex scenarios?