Goodbye is such a bittersweet sorrow

Saying goodbye is difficult for me.
I had said a lot of goodbyes already in my life time. I believe going to the airport is such a hateful act for me to do. I hate going there because I don't want to see the person I cared for leave. Likewise, I never wanted people to send me to the airport because I don't want our ties to be strongly bound before I leave. Five years ago, I said goodbye to EonJu. He had been a very good friend of mine and we had shared very intimate friendship. However, because I didn't want to see him go, I didn't meet him for a long time. Until one day, he got so mad that he cut off our friendship. It was my fault, but I needed to do that because I'm afraid. I'm afraid to be left in a state of delirium. Anyway, the second was saying goodbye to my gal bladder. Yeah, I'm a bladder-less person, but I can eat anything I wanted to or do even extreme sports. However, since I found the reason for having gal stones, I restrained myself. From then on, I stopped eating red meat or drinking soda or drinking alcoholic drinks. After my gal bladder left me, I have found lots of restrictions in my life. Third, my bestfriend got married. She's the only person I can confide everything I do in my life, but it's over when she got married. So much restrictions from her end. Lastly, my sister. Despite I didn't want to send her to the airport, I didn't have a choice. It will be the last time that I'd be seeing her this year. She'll be back after a year.
So you see, I hate goodbyes! I know these people will possibly come back but of course my gal bladder will not...but I just can't get it. Why do they have to leave? Why not me??!! hahaha...Anyway, I hate it and I just can't hide it.