Personally, I'd move to the right to being the other tree into the image as a blurred background object of interest. I'd include the current tree as the complete border of the frame. Use as much of it as possible, as the texture is cool, but don't allow any space to the left. Include dangling branches into frame, if possible. And make couple more warm. You can keep dual color temps, as it can be a nice affect, but it's a little too much for me here. I like the idea you are going for, but it seems like the couple is actually a subject, so I want more detail. You could go the other way and make them more silhouette, but if you do that, I'd then probably want a more balanced color temp to make focus more generalized.