For years, I’ve complained that the love lives of aging baby boomers like me are rarely given on-screen treatment. But a recent increase in films that cast a sympathetic eye on sex and love among the aging makes me wonder if Hollywood is getting it: boomers are still life- and love-embracing people— and we buy a lot of movie tickets. “Le Week-end” (2013) stars Jim Broadbent and Lindsay Duncan as a long-married couple seeking to rekindle things in Paris. Funny, poignant, and harrowing, “Le Week-end” is like watching marital therapy: a lack of sex and romance loom large. It’s a joy to see them rejuvenate their long-dormant passions, despite their kitchen-sink fights. “Gloria” (2013) is a Chilean-Spanish film with an unforgettable lead character in Gloria Cumplido, a 58-year-old divorcee. She frequents local dance clubs, sleeping around indiscriminately and without much satisfaction, until she meets a shy former naval officer and learns, for the first time in her life, the difference between sex and romance.  “Enough Said” (2013) stars Julia Louis-Dreyfus and the late James Gandolfini a …