What is the meaning of 'live' in this text?
Solution 1:
The song And I Love You So is about a person who has just fallen in love, and their life has begun again.
"begun again" implies that they lost a previous love, although it's hard to tell whether the previous love died or just left them. When that happened, their life became extremely lonely, and they felt like they were dead.
When people ask "how they've lived till now", they're asking how they've managed to survive this horrible loneliness.