'I said to myself, 'I'm never gonna date someone like my dad,' ' she says on '20/20.'By Jayson Rodriguez Diane Sawyer and Rihanna Photo: ABC/ Ida Mae Astute Rihanna was reflective and revealing throughout her "20/20" interview with Diane Sawyer on Friday night (November 6) as she spoke about her relationship with Chris Brown and explained that abuse was also a part of her upbringing,…