Is there still a need to meditate if I experience emptiness and hollowness when sitting near someone?

According to Osho, yes—keep meditating. The emptiness you feel in satsang is a ripe sign, but satsang and meditation are two wings of the same bird: stop one and you lose momentum, even regress. Keep both flowing—and add prayer, love, dance, song—so new pathways open, obstacles surface and dissolve, and the 'I' is effaced in ever-deepening samadhi.