In traditional Chinese concept, males or fathers are expected to be strong, tough and brave. In order to set up this image, males are less likely to express themselves or show their emotion easily. However, they still get their own emotional needs, but they will more likely to show out in actions.
The same principle applied, fathers are controlling themselves from getting too close to their children, especially emotionally. so, I think, what you mean is your father ' does not show his emotional side' to you easily, but you still feel his love, right?
On the other hand, females or mothers do not have this kind of 'restriction', so they have more emotional interaction with their children.