If “Grown Ups 2” has wrapped, why is actor Alexander Ludwig still tweeting about being in Boston? Because the Canadian actor who may be best known for playing Cato in “The Hunger Games” is spending a lot of quality time with Nicole Marie, a Boston-based model with Dynasty Inc. and the local account rep with Isola Shoes. The pair have been furiously tweeting their affection for each other for the past few days. “Why do I have a craving for strawberries and whipped cream?,” Ludwig tweeted Tuesday. To which Marie, a Concord native, replied, “bc your beautiful GF spoils you. Have a feeling u may deserve it tho.” Aww, aren’t they adorable? After he finished filming “Grown Ups 2,” the Adam Sandler sequel shot over the summer on the North Shore, Ludwig started working with Mark Wahlberg on “Lone Survivor,” about a failed 2005 Navy SEAL mission to capture a a Taliban leader.