There's definitely a difference between a healthy romantic pursuit and stalking. It's just that in intense versions of the former and mild examples of the latter, it might depend whether you've just seen a movie. And whether that movie featured Ryan Gosling

University of Michigan researcher Julia R. Lippman wrote a study titled, "I Did It Because I Never Stopped Loving You: The Effects of Media Portrayals of Persistent Pursuit on Beliefs About Stalking." Whoa. To translate, she studied whether rom-coms made people more accepting of stalking behavior. She showed her subjects a 30-minute clip of one of six movies portraying romance and then had them answer questions about stalking myths.