This drawing is really touching! and the way how you used the colors, the shading and where to add the bright spots are perfectly done
The back-ground seems so suitable for the kind of scenery and the snow gives a huge impact on it too so as the light on her hands.
The expressions on their faces are well done and so with their outfits and may i say the tears are perfect and the location is well drawn.
In this picture it seems that the boy tries to hide his pain but it seems she doesn't want him to die yet the idea of this whole drawing gives the impression of your creativity as well