The pair have reunited almost three weeks after Brown, 19, allegedly battered the "Umbrella" singer on Feb. 8, a source tells PEOPLE."They're together again. They care for each other," says the source. The on-again couple are currently spending time together at one of Sean "Diddy" Combs's homes.Adds the source: "While Chris is reflective and saddened about what happened, he is really happy to be with the woman he loves."