Blow-up fights at the Colosseum, tears atop Mount Kilimanjaro and clashes over the window seat: Incompatible travel buddies can ruin a vacation.

As experts in friendship , travel and decision-making , we know that the stresses and complications of travel, not to mention the near-infinite number of decisions you have to make, can put a lot of pressure on a relationship that was perfectly delightful within a 10-mile radius of your homes. There's a reason that people tell you to travel with someone before you marry them!

Thirty-five percent of travelers found that they weren't compatible with a travel buddy, according to a Booking.com survey conducted in July of 1,253 U.S. adults who'd gone away overnight within the last 12 months.…