GM XDSE

"[Romantic love] is a very powerfully wonderful addiction when things are going well," said Helen E. Fisher, a biological anthropologist at Rutgers University, in a 2006 TED Talk. That's because those hormones that your brain releases when you're in love are intensely euphoric, so much so that they can make you addicted to love—and the person you're in love with. For advice on finding someone who makes you feel this way, check out The Biggest Dating Mistake You're Probably Still Making, Experts Say.

Now more than ever, divorced individuals are finding love and happiness with new partners and remarriages. In 2013, 23 percent of married people had been divorced at least once before, compared to a much lower 13 percent in 1960.

Humans aren't the only species in the animal kingdom that practice monogamous relationships. Out in the wild, beavers, otters, wolves, seahorses, and barn owls are just some of the 25 Adorable Animals That Mate for Life.