“Regretting You” (** out of four) was a sincere but vapid adaptation of Colleen Hoover’s novel about a mother and daughter (Allison Williams and McKenna Grace) who become closer to one another after a devastating accident and try to repair past years of emotional damage and duplicity that tore them apart. Good performances help to keep you watching for a while but film is never particularly insightful, moving, or funny. Both Williams and Grace have a few good scenes together especially at the end but you still may end up “regretting” seeing this one by then.