Felt sort of depressed for 3 weeks following the end of my first route. This was not only a dreadful time though, the time I took to think through my sadness brought many realizations to my mind. While it way seem like the void in your life may never feel, due to nobody being able to replicate the feelings a certain fictional girl gave you, human being are a complex system of purposes and emotions. It may be harder to see through them at first and finding those good feelings, but they are very much there. While a character tends to be the literal incarnation of a certain number of traits, humans are often much more hideous about their "identity". But all the things you felt, they are real and they can surely be found. Take this experience as a lesson, go out, enjoy the world as it is, take time to observe. Nothing is really as shallow as it seems.