Are we moving away or towards each other?
At the present time this doesn't hold for the observable universe, since the observable universe is only a tiny fraction of the surface of the 3-sphere (assumed it's a sphere at all). The observable universe is flat within a 0.4% error.

Based on this, we are moving away from each other. And the universe is expanding. So even if it would be curved, we would move away from each other. Only in a future Big Crunch scenario, we would eventually move towards each other.

Finite flat cyclic spaces can be constructed, but there is no significant hint, that the universe is of such a shape, or any other non-trivial topology.