Popsugar Love Family Life Signs Your Brother Is Your Best Friend 17 Signs Your Brother Is Your Best Friend December 25, 2016 by Macy Cate Williams View On One Page Photo 15 of 17 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 15 He knows all your secrets. And maybe sometimes uses them against you. Previous Next Start Slideshow Family LifeSiblingsFriendshipGifsHumor