Lauren Graham should be a happy lady these days, as Parenthood’s second season premieres tomorow night  (NBC, 10 pm et/pt) and she is also dating her Parenthood co-star Peter Krause. Plus, this season should provide a slightly sunnier forecast for “Sarah Braverman” (Graham), whose life was pretty much a Greek tragedy during the first season. “She’s having some happy things happen to her and I don’t know it just leaks into real life, it was a heavy storyline last year and now it’s more mixed,” said Graham. Click on the media bar to hear Ms. Graham give fans her thoughts on the upcoming season of Parenthood.