Shawn Mendes and Camila Cabello’s longtime friendship appears to be transitioning into a steamy relationship, likely to the satisfaction of Shawnmila shippers.Mendes, 20, and Cabello, 22, first met while opening up for Austin Mahone’s tour in 2014. At the time, Mendes was fresh off of his Vine success and Cabello was still a part of Fifth Harmony.