Can someone interpret this dream I had about my ex girlfriend?

The dream started off with me and a few people in a fancy house. But it was a zombie apocalypse, so I'd go outside and kill a few that were coming up and go back inside. Then we captured a zombie and we tried to dissect it and we found out that it was leading the other zombies to where we were. We had to vacate the area, and the next thing I knew I was with my mom, and my little brother inside our house, it was abnormally clean. Like white alien room clean. My sister and my dad weren't there which was weird, but one of my aunts were. Then I looked out the window and I saw what I thought was a legion of roving zombies, but it was just alot of humans moving really fast. But I saw my ex girlfriend looking very beautiful standing on top of my moms car. I put my hand on the window and looked at her.and she saw me and made a snooty look walked off my moms car and faded into the crowd. I punched the window and it broke. surprisingly because i thought it was a thick window. So the rest of the dream went with my spending time with my family in the clean house, gathering food and waiting for the zombies so we could board up our house.