Share the memorable moment!

Today, there is something strange to me, but i don't know why. This morning, after coming to my company, i felt very lonely and sad. But, if you ask me why, i myself can not answer. In fact, sometimes in my life, there is some moments i can't understand myself. I don't think that there were two persons who can identify my feeling. The first person was my manager and the second was my foreign friend i have just met for two weeks. they asked me why i look so tired and sad, whether there was something wrong with me. After that, i found that i am not lonlely, i am very lucky because there are some people always being care about me.