You can drive yourself crazy deciding whether to marry your partner.
Can you two really survive a lifetime together?
I mean, you adore them — but they constantly leave hair in the shower. They tell the worst jokes — but they're always there to comfort you after a hard day.
Perhaps it would help to turn to the scientific research, which has pinpointed specific factors that can make or break a romantic relationship.
Below, we've rounded up 15 nontrivial things you might want to keep in mind before hiring a wedding planner.
This is an update of an article originally posted by Drake Baer.
A 2014 University of North Carolina at Greensboro study found that American women who cohabitate or get married at age 18 have a 60% divorce rate, but women who wait until 23 to make either of those commitments have a divorce rate around 30%.
"The longer couples waited to make that first serious commitment [cohabitation or marriage], the better their chances for marital success," The Atlantic reported.
The honeymoon phase doesn't go on forever.
According to a 2005 study by the University of Pavia in Italy, it lasts about a year. After that, levels of a chemical called "nerve growth factor," which is associated with intense romantic feelings, start to fall.
Helen Fisher, a psychologist and relationship expert, told Business Insider that it's unclear when exactly the "in love" feeling starts to fade, but it does so "for good evolutionary reasons," she said, because "it's very metabolically expensive to spend an awful lot of time just focusing on just one person in that high-anxiety state."