There's NOT one 'dream house'. There are lots of houses that will tick the boxes for a dreamy house! You just need to wait until someone else want to move to another house. It sounds simple, but really think about it.
you missed out on A house that would have been nice, but it's not THE house.
why did you miss out? Was it a processing issue or were the other people able & willing to pay a lot more? Are you in a position to progress or do you still need to sell yours? Could you have offered any other benefits, such as flexibility?
think about what you could have done differently, what you could do better next time then let it go.
reframe it in your mind & keep looking. Another (possibly better) house is out there for you, then you'll wonder why you were so upset by this one!
(im looking too, have been for a couple of years, but it's a big jump from what I have to what I want, there's F all coming in the market where I am & I need to stay local for work). I'm fed up of it, but that's life.