Selena Gomez may be headed down the aisle with fiancé ... Gomez and the One Direction hottie Niall Horan had fans constantly wondering if they were more than just best friends.

The duo broke up the same year. Selena Gomez also dated the musician Niall Horan in 2015. The couple had been friends for years but grabbed attention after they were spotted having dinner in Malibu.

Selena Gomez and Benny Blanco will be walking down ... DJ and music producer Zedd, Niall Horan, Charlie Puth, The Weeknd, Zayn Malik, and others over the years. Her past relationships include ...