Best Man
In case you haven't deciphered the puzzle, Brian is Ben's brother, so they've known one another since 1993!
Groomsman
Benjamin and Christopher met as residents of Lechner Hall at Texas A&M, and decided to take the plunge to become roommates the following year. It must have gone okay, because they're still friends more than a decade later!
Groomsman
John and Benjamin met at St. Mary's Catholic Center in College Station and bonded over a common love of music, theology, and philosophy. John even played witness to Ben's first foray into theatre when they played father and son in a play written by Pope John Paul II!