When i started my career after graduation in the current firm i'm working for (yeah, almost 2 years still in the same company), i thought i would never got the upset feeling if anyone around me walked away from this place, for people's come and go was such a common phenomenon, especially if they were in a not highly-paid position or company.  

    For the past 18 months, it's ture that i have witnessed dozens of farewell emails sent to those "dear colleagues" from the leaving ones. For most of the cases, i simply read and cross them out, for they are nobody to me. However, when it comes to the people i know, it's really not that easy to get that over. Yes, they are just colleagues, maybe even not fellow colleagues, honestly. But when they go, without exception i feel sad and lost. Is it because i have been putting my emotion on them and it's getting hard to get rid of it? Or the experience with them has become part of my life, and i'm used to seeing them everyday, and this is so real, and i'm afraid of not being able to see them anymore, afraid of changes?