text: INSERT INTO comment_friends (status, commentid, user1id, user2id)
      SELECT 'I' AS status
           , l1.commentid, f.user1id, f.user2id
        FROM likes l1, likes l2
           , friends f
       WHERE 1=1
         AND l1.userid = f.user1id
         AND f.user2id = l2.userid
         AND l1.commentid = l2.commentid
  ;
  