Yes, Connor Jessup and Miles Heizer are in an open relationship as per their confession during the multiple interviews.
Connor revealed about their bond and him being gay with an Instagram post. He had already been dating for the past few months at that time and it has been more than two years of their dating life.
Miles Heizer is a well-known actor for his role of Alex Standall in the TV series 13 Reasons Why. He rose to fame after his inclusion in the TV series and his character got much popularity from the fans.
