“Love Is Blind”: Why are these TikTok girls getting 15 minutes of fame off S.K.? — In our quartet of friends, two of us were clearly closer than the other two. (If you’re a fan of “Living Single,” “Girlfriends” or HBO’s “Insecure,” that was the four of us. In that friendship dynamic, I would’ve been Khadijah, Joan or Molly.) I was fairly close with two of…