Sakura loves Shirou. That's really what it boils down to! He was her inspiration for a long time, a dear friend and someone she'll always look to when times got rough. Even in the aftermath of the Holy Grail War, there was nowhere she'd rather be than by his side.

So it's... a little difficult, knowing that this Shirou isn't exactly her Shirou. She's a little afraid to talk to him about anything from back home, since that might lead to some uncomfortable revelations on just how different their timelines are. But that's not going to change how she views him, and it won't push her away from him. It'll hurt, but if all she can be is a friend to him, then she'll play that role as best as she can. His happiness is her priority, after all.