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 10 of 17 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 10 He's your biggest cheerleader. When you accomplish something, he feels like a winner too. Previous Next Start Slideshow Family LifeSiblingsFriendshipGifsHumor