romantic love vs. obsessive/passionate love

Passionate, obsessional love doesn't last. Apparently. Certain books I've read tells me it does, but I guess I should trust the experts. Romantic love can, they say. (From here.)

"I think generally, in the literature, love has been measured as passionate love, so I think that's one reason for this widely-held assumption that love had to fade in relationships," said Bianca Acevedo, a postdoctoral researcher at the University of California, Santa Barbara, who authored the study while she was a graduate student at Stony Brook University. "The obsessive component is generally combined with the romantic component. Thought of that way, it looks like it's diminishing, but if you assess the romantic love differently than the obsessive component, it happens for a greater proportion than what was generally thought."

Romantic love has the same intensity, engagement and sexual chemistry as passionate love has, but without the obsession, Acevedo said. Passionate love, on the other hand, includes feelings of uncertainty and anxiety.