(WARNING! ⚠️ I wrote this when I was 16 years old, it's going to be a little bit cringey, I'll try to edit this, you've been warned, thank you!) "Obsessive love disorder" (OLD) refers to a condition where you become obsessed with one person you think you may be in love with. You might feel the need to protect your loved one obsessively, or even become controlling of them as if they were a possession. symptoms of obsessive love disorder? an overwhelming attraction to one person. obsessive thoughts about the person. feeling the need to "protect" the person you're in love with. possessive thoughts and actions. extreme jealousy over other interpersonal interactions. low self-esteem.