Parallax (n) /ˈper-ə-laks/

The apparent difference in the position of an object when viewed from a different position.

This is why airplanes, when viewed from the ground, seem to move slower than cars, or why stars only shimmer instead of streak, or why my memo of you don’t move at all. 

Derived from the Greek parallaxis, which means alteration, or change. E.g. despair is hope altered by time or distance.

Astronomers use parallax to measure the vast distances of heavenly bodies. Each measured object forming a rung on the cosmic distance ladder. Employing this method I have calculated your distance. Once there was no distance at all, now it is nearly unfathomable. 

By the common perception of space and time you are near. But in reality, we occupy different dimensions. Perhaps, a particle accelerator and theoretical physics to find you, but we both know that strange quark could not last long. 

Therefore, as a lay person, such as myself, it is best not to try too hard to understand such concepts, and to just accept that you are not here, or that where you once were there is now a very real void. Apparently.