15 facts about relationships everybody should know before getting married

20th Century Fox / GettyAre you and your beloved star-crossed lovers?

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 non-trivial 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.