Why Am I So Sensitive?

Hello! I don't know which section this is for, that's why I'm posting it here. I am 20 years old. I have a sensitivity problem. I am too sensitive to everything. Whatever happens, I experience it very hard, even if it is not directly related to me. If I see a person crying, whether he is good or bad with me, I cry. I am also very attached to everyone and everything. I've been like this since I was little, and this weighs on me, because sometimes our paths part with certain people, and I stand and grieve and find it difficult to overcome the divisions (I'm not just talking about boyfriends). For example, last year I worked in a bar, we were very cool staff and we were very young people and we respected and understood certain people and they were very close to me, even though I was there for 2 and a half months. When I had to leave, I looked at common photos many times, wrote to my colleagues, listened to songs, which we listened to at the bar and I was very sad and still am. I quit my job today because I'm starting university soon. I was at this job for a month and a half and although I tried not to get too close to the people, because I know that then it will be very difficult for me when I leave .. Well .. Well, today I was looking to quickly say goodbye, I was I was shaking, my voice was shaking and I was crying .. And I didn't even have any relationship with them, let's understand each other, we respected each other .. But I don't know what's going on .. Now I keep my notebook and other things related to this work .. From a young age I am attached to hell a lot of toys, animals, not just people. And when something happens, I think about it for so long .... I also love very sad and heavy books, movies, songs .. Very often I fall into such states of depression, I do not know what it is .. And without much reason. It's just that now I'm listening to this music, I'm crying at some movie. And when, for example, the movie or the series is over and I'm still empty, I was a hero in them. And I also don't know what it's like to hate someone. I can't hate anyone, I only hate certain qualities, actions of this person, but I always find good in anyone .. When I was younger a teacher told us about hatred and how there are no people who do not hate someone .. And when I said that I was like that, he told me, I almost have to be a 'superman' and it is impossible to be like that. In fact, it is. And I don't know how to deal with this deep soul of mine. Q. I hope you publish my story and hopefully there is someone to tell me how to handle it. PS 2: sorry, if there are spelling mistakes, I write from the phone.