Essentially, it is what you make of it, but happiness is paramount, and morality is a great tool for helping other people achieve this goal (plus, being good can feel good).
I don't think nihilism is a useful position to hold, and usually indicates poor happiness.
Option #2 sounds like a great purpose to make of your life, and is also spiritually valuable.
Your path is different than mine, which is different than Shadowstaar 's.