The girlfriend rumors for Zac Efron in 2014 have included his sexy co-star Halston Sage, but as the buzz swirls, Zac says he is ''not investing'' in the dating market. The 26-year-old hunk - who was recently rumored to be dating 'Neighbors' co-star Halston Sage - has played coy about his relationship status, claiming he isn't actively looking for … [Read more...] about Zac Efron Girlfriend Rumors for 2014 Include Halston Sage – Not Dating Though?