It´s said that picture is worthy more then thousands words. You really managed to make picture like that. The idea choosen (the melancholy) breathes from every part of the picture. It truly shows sadness and emotions. Aslo you have chosen good stocks to work with and mixed them together very well. It feels more like whole photo then picture made of another pictures which is basical for good photomanipulation. I especially like raining effect. It fits picture well. Also I appreciate simple colouring, not having too many colours in the picture. Melancholy makes you see things rather gray, so you did well not using too bright/intense colours. Overall expression? Great work!