Clockworker's Dream Journal

I thought I'd only come here to post lucid dreams, but I feel obligated to share this very peculiar and vivid experience ¹.
So this dream starts as me and a couple of friends arrive at a little world war two scenario called Hellendoorn, a city located in The Netherlands. I recognize the place, and easily drive a car in its familiar landscapes. Snow has covered the grass, and the lake is pitch dark from outside. A very blue, indigo look. The watermill is barely moving. We then step out from our car ², now heading to a house situaded by the watermill and lake, we seem to be wearing fancy clothes. The house is much, much bigger from what it looks in reality, and I would call it a mansion. As we wait for someone to open the door, I check some family pictures of the ones who live in the mansion (these were in my pocket), and discuss their daughter's appearance with my friends. I think to myself, "she's kinda cute".
A little blonde girl welcomes us in, as we make our way to the living room. We spend the night there and have dinner, watch television and play videogames. It's all going just fine when the girl from the picture (the one we were talking about, before going in) decides to tell me she wants to make out with me. I feel great she picked me instead of the other two, and we kiss and fool around while we watch something on the tv. Everything looks great to me, "what a night, this is sonot what I'm used to do", when I realize I have a girlfriend already, and that this would be considered cheating. It was cheating. I perform a huge facepalm and stop kissing her. We both move to the kitchen and I tell her I should not at all be doing that, for I had a girlfriend who I really was in love with. She tells me she also has a boyfriend, however I'm not sure if she regrets what we've done as much as I do. I feel extremely bad about myself and wake up.

¹ Okay, it sounds stupid to those who weren't there, but the atmosphere of the dream was impressive from the inside. Everything was perfectly built up and elaborated, I felt weird when I woke up and realized it was all inside my head. I like this feeling and I don't get it very often, so this is basically why I'm posting it.
² It's a 1942 German Vehicle, and it has the odd ability to transport passengers through water. I believe it was also used by the military (Germany), during World War II.