@Setanta,
Setanta, thank you for your suggestion. I am a newly graduated student, majoring in english. this is my first job, it seems that I need to reflect my social ability of communication. Because of trust, I told one of my colleagues that I have the intention to quit the job. then tommorrow HR and my manager talked with me about my dimission. It seems every body knew that.
I am very depressed, you know to me it is a kind of betray. I trust her, so I told her my true feeling. Maybe to her, it is just a topic to talk about. Her action really hurt me. Colleague can not become your friend who you can trust.
Anyway, time to leave the job to start a new travel.