Bad dream

Twice last night I dreamed about my ex.  In both dreams, she was laying in bed and I was coming into the room.  Another man, Chris, was just bending down and kissing her neck, with a big wet kiss, and she was liking it.  I went over to the bed and she gave me a nasty look, and I woke up at that moment both times.  I know dreams aren't real, and often the people in them are aspects of ourselves, but this seemed so real.  It really set me back today.  I'm feeling awful.
I have to drop off my son later today, which means I will see her briefly.  I'm torn between still craving seeing her and maybe getting a kiss on the cheek, and hoping she isn't home as I know it will just hurt more.