We are educated by our parents and schools about the value of honesty since we understand the meaning of the words "yes" and "no". However, we can always see some cases from a film or in our daily life, that a person really benefits more or less from lies. I guess, this is the reason why people lies in a relationship nowadays. As for me, I always want to be an honest person and make friends with honest people.
While I would admit that a person lying has certain reasons and may benefit from it for a time. However, for most cases, the reason a person lying to another is he considering more about himself even if that means hurting the feeling of the person who trusts him. If so, I can barely see any reasons for the person who are hurt to continue the relationship basing on no respect or kindness. Furthermore, A lie always follows with another lie until the liar even forgets what the truth looks like