Yes, you can work on the symbolism of your house yourself. This is clearly not a full analysis, and it doesn't address the energy balance, but your depression might be heavily influenced by the artwork in your environment. So, let's talk about feng shui art. In feng shui, art is designed to enhance a given mood. We use particular images to aid relationships, health, money, and so forth.
Most desirable artwork is representational and shows pleasant scenes.
Begin looking around you. If you are depressed about a relationship, have artwork of happy couples. Take down artwork that is sad, gloomy or frightening. This, in and of itself, may reverse the depression. Since feng shui works quickly, you will know within a month if you need more feng shui.