“The Midvale High School 50th Reunion” opens Friday at The Public Theatre, 31 Maple St., Lewiston.  ‘Midvale’ shows how revisiting your past can change your future when an old classmate turns into a new love in the charming and thought-provoking romantic comedy running May 4 through 13. This hopeful play takes an unsentimental look at the choices we’ve made in our lives and reminds us that it’s never too late to make new choices, or even to fall in love. Above, Nisi Sturgis and Torsten Hillhouse as the young Tom and Bettina and Joyce Cohen and Mel Shrawder as themselves today. The “Midvale High School 50th Reunion” runs May 4, 5, 6, 10, 11, 12, 13. Show times are Thursday, Friday and Saturday at 7:30 p.m., Sunday at 2 p.m.  with an added Saturday matinee on May 12 at 3 p.m. Tickets are $20 for adults and $5 for anyone 18 and under. For tickets call 782-3200 or visit www.thepublictheatre.org.