You Know,
Here's Vine's definition...
>> <A-2,Noun,2083,hetairos>
"a comrade, companion, partner," is used as a term of kindly address in Matt. 20:13; 22:12; 26:50. This, as expressing comradeship, is to be distinguished from No. 1, which is a term of endearment. Some mss. have the word in Matt. 11:16; the best have heterois, others, AV and RV, "fellows." See FELLOW.<<
Used here, it's not meant as a "close persinal friend" however as Vine's says "a term of kindly address." So if JW's were to follow Jesus' example, they should "kindly address" df'd ones, not ignore them.