Jack and Lexie

So I do believe that these two have a  LOVE / HATE relationship.  They love each other SOOOOOO much, but they fight like cats and dogs until we threaten to send one of them home.  THEN it's
"NOOOOOOOOO  I LOVE HER   or   NOOOOOOOOO  I lLOVE HIM"   They are going to be best of friends their whole lives!!!!