I couldn't figure out this dream, it is kind of strange. First thing I know I am outside of a (random) house with my friends girlfriend. We walk up to the door. I look at the peephole, knock, and immediately open the door without even waiting for someone to answer. My friends girlfriend and I immediately go separate directions once we enter the house. I am walking down the hallway and i randomly open a door. There is a guy (I don't know who he his) shaving. I run back through the way I came laughing, jump on a random couch in the house still laughing, and my friends girlfriend also comes from somewhere else in the house and jumps and sits on me and we are both just laughing. I then wake up. I see my friend a couple times a week, we are cool with each other. I'm not sure what this could mean.

Sounds like you went on a little adventure in your sleep. The part where you go along with your friend's girlfriend could mean you want to try something risky.