Muselisation

As I grew older I realise human can be quite a scary animal. Irregardless of the amount of time you have known one another, people still lie to you. Despite you pouring your true feelings to them they still disappoint you with lie many times. This is the ugly fact about human that until today I still find it hard to accept.
2 years ago I learn through a painful lesson that never to believe anyone so readily and easily again, but things still happen and mistakes still take place. Am I too naive or plain stupid? It really make me feel very scare about how these people can paint a million dollars worth painting on one side to you, while shits are all over the place on the other side of the painting.
Well, for those who are concern, I'm not talking about Wyne rest assure. But rather some friends whom I had known for years, and while they slowly revealing layers of their skin, do I realise that there were hidden lies.
Not like I don't lie, I do, but when I felt that someone is sincerely talking to me about his/her life, likewise I will want the person to feel my sincerity as well. Am I not being sincere enough that they have to lie to me, or is just to gain something from me?
Gosh~! The more I think about it, the more I think that it's very very scary about how people can lie just like that...