John concluded as he did to explain the brevity of this epistle and his hope to visit Gaius soon. This conclusion is very similar to the one in2John ( 2 John 1:12-13; cf. John 20:30). [source][source][source]
The use of "friends" to describe believers is unusual. John evidently wished to draw attention to the basic quality of friendship that exists among believers. As friends Christians should show hospitality to and should support one another, the specific expression of love that John urged in this letter. [source][source][source]