Check out this Photoshop tutorial that I found pretty awesome. I added my own things to it but the beauty of this tutorial, you can adjust everything to make it original and your own.
After all the steps, I added this background below the bokeh layer and put it on Hard Light at 50%
Once you do that, I added a contrast and brightness adjustment layer to the very top. The values I used are -47 for brightness and 53 for contrast.
You can adjust anything on here but this is my result: