LOS ANGELES (Reuters) – More than three years after being beaten up by then-boyfriend Chris Brown, R&B singer Rihanna has admitted that she still loves him, calling Brown possibly "the love of my life". The "Umbrella" singer told Oprah Winfrey in a television interview broadcast on Sunday that she and Brown, 23, had rebuilt their trust and now had a "very close friendship". Brown was convicted in 2009 of assaulting Rihanna, his girlfriend at the time, in a violent attack on the eve of the 2009 Grammy Awards in Los Angeles. …