Blue Bloods fans have been begging to see a Detective Danny Regan and Maria Baez romance blossom on screen, but actress Marisa Ramirez isn't sure that will ever happen.The friendship between the detectives, who have been partners since the start of the series in 2010, is a fan-favorite, perhaps even the most fan-favorite. The two are best friends with a wholesome and unique connection, and they gladly risk their lives for each other each week.