Because the most complex questions made by you in your lifetime, like those related to love and happiness, were already answered, probably by more than one person.
Beware, though, that such answers shall not be considered definitive to so subjective questions, but it is at least interesting to know the point of view of someone who took the time to elaborate and write it down.
Even though your question is so complex that nobody wrote about it yet (I would say, search again!), philosophy shows you many different approaches on how to think, which might help you getting your own answers.
Are you interested in philosophy? What philosophy did for your wellbeing so far? What great ideas from philosophy could be applied to daily life? Please comment!
Check out the 8 Bit Philosophy – they have awesome videos with very practical approaches to some philosophers’ ideas using vintage video game graphics.
Please remember that English is not my first language, so I apologize for any mistakes or weird word arrangements. Help me improve by sending an email or commenting if you find anything wrong or bad-sounding!