Sarah Jessica Parker is opening up about her relationship with Robert Downey Jr.In a new interview with the star reflected on her seven-year relationship with the actor and his struggles with substance abuse.Parker said that at 22, she often felt like Downey Jr.'s parent, telling the outlet that she tried to create stability around him in what was becoming a chaotic environment.«People around him would be dismissive of me, but I had given him stability and tried to create a steady heartbeat that allowed him to show up on time,» Parker said. «That made me angry and embarrassed me.»Downey, through a rep, told the magazine that he had «great respect» for Parker.The pair met in 1984 after filming the thriller,, and dated until 1991 as they both worked to establish themselves in Hollywood.