Emotions

Hi everybody,
I've been searching for a long time for some answers about psychology, and i couldnt find an accurate answer, so if can anybody help me to find a close answer to my questions or guide me to find some book that contains the result of experiments that lead to my questions.
like..
what about emotions, are they biological or psychological factors, like if someone is evil, good, shy, boring, funny, ex.. are these Innate or Acquired.
i know that scientists are still searching for it but i wana know the closest answer to that.

and what are the things that the child go through and affects his adulthood (traumas).

and what triggers love !! is it biological factors or psychological factors.

and about choosing a mate there are some researches that say we choose our mates that are similar to our parents.

so many questions but there's no accurate answer for them...

thanks in advance..