Ricky Martin commands the stage with an air of confidence, yet the Latin superstar admits to being self-conscious at times. “I’m still human and sometimes I feel uncertain about things,” Martin admitted Thursday night at the Broadway premiere of the revival of “Evita,” the Andrew Lloyd Webber musical. As for “coming out” over his orientation, Martin admits that was an important step for him. “That helps a lot” the Grammy-winning performer said. “Now I’m just allowing myself to feel onstage and see lives though the life of this character.” Martin has a few lives of his own to deal with these days as the performer is “Livin La Vida Familia” with his partner, Carlos, and their twin sons. “I’m loving every minute of it. Loving every minute of it,” Martin said. Martin plays Che, the everyman narrator in the show currently playing at the Marquis Theater in New York. … Matt Lauer is sticking with NBC’s “Today,” ending speculation that the top-rated show might have to face ABC’s rising “Good Morning America” without him. Lauer has signed a long-term contract to remain as co-host of the No. 1 morning show, a long-anticipated deal that NBC announced Thursday night but Lauer made public on “Today” Friday morning. “Truth be told,” he joked, “I was developing an idea for a new show, where viewers could tune in every morning and see someone they know lose a little more of his hair every single day right in front of their eyes. But then I thought, I could just stay here and do that.” Lauer’s decision provides important stability for “Today” and puts to rest suggestions that he might reunite with his former co-host Katie Couric on the syndicated show she’s launching this fall.