become a lier is right or wrong????

lie,,,
when i was child my mums and my daddy sometime lie wit me,,
why,,, cause they dont want i crying,,
when i was in elementary school,,
my teacher told me that we are not allowed to lieing
why,,, because lie is a bad habit
now
when i was chatting wit my friend
as long as we talk
i become a lier for a first time
then because of that think
he break our friendship
why????
whats wrong with lie
whats wrong with a lier,,,
we must know the reason why sometime people become a lier????
life honesty in the world..
can u life honesty in the world with out lieing???
i still confuse,,,
lie is wrong
or wright
and are u angry if ur friend become a lier?