Let’s say you fall in love with Siri, but she breaks up with you. Can you go back to the Apple Store for a refund? (Asking for a friend.) With that burning question out of the way, let’s talk about “Her” (2013). The plot – a dude living in a digital-media-immersed Los Angeles falls in love with his uberSiri computer operating system – is so quirky it’s almost a distraction from all the questions it provokes. At its fascinating core, “Her” wants us to ponder the nature of love, specifically, and relationships, generally, in our Facebook age. I wonder what Siri thinks.