I took biology, physics, chemistry, sociology in college and none of them taught me the meaning of life, what kind of relationships I should have, what values to prioritize, what kind of art music and aesthetics to appreciate.
Then you didn't pay much attention. Figures. Given your general lack of scientific ability.
There was no scientific law printed in any text book that gave the definitive answers to the questions in the OP.
You don't understand the topic at all.
You're a moron.