Q:

Is it lying if ylu are crying and your mother asks you whats wrong and you say nothing do i get the si of lying to my parents

A:

In the Name of Allah, the All-Merciful, the Mercy-Giving.

All praise is due to Allah. Peace and blessings be upon His Messenger Muhammad. 

If you are not telling the truth, this is lying. In such situations, one can avert lying by using words of general and broad meanings, metaphorical expressions, divert the course of the dialogue, deflecting the questions, and the like techniques.

It is well understood that you do not want to hurt your mother or make her worry; but still you can achieve this noble goal through a better and legitimate way.

Allah knows best.