Who are Strangers?

According to the Oxford Advanced Learners' Dictionary, a stranger is "a person that you do not know"; or "a person who is in a place that they have no been in before". In addition, it also defines an idiom that includes the term 'stranger': Be no/ a stranger to something. It means "to be be familiar/ not familiar with something because you have/ have not experienced it many times before".

My mind has been thinking about this concept lately. It is so strange that I feel all people who I have known are becoming strangers to me. This perception against all those usual definitions above. I have known them for all my life, or at least, from one to half a decade; or I have lived or been to this place for several times, or many years, but I am a stranger to them. The connection among us is fading away. I am upset, scared, and disappointed because at the end of the day, I am all by myself. I could never seek help or support from the ones that I know. I am mentally and physically detaching from people who I thought are my whole world to me. I do not understand or sympathize with them anymore, and neither do they. We are turning to different direction, I guess. It's time to let it go and accept the truth. I can do nothing about it :(