Fight For A Girl ...

Hi, I'm a 16-year-old boy. I live in a resort town where there are constant excursions from other major cities such as Sofia, Varna, Burgas, etc. One day I found out that there was a camp in Sofia with a lot of girls. Since I'm not shy at all, I immediately wanted to meet them somewhere in the center or on the streets. And so it happened that I met them in the city and talked to them, we met and offered them to go out tonight. Without suspecting that they were engaged and their friends were with them at camp we went out. The evening went great with one of the girls we liked, we wrote to each other all night on snapchat I was curious why he did not want on fb for example, but I did not ask. The next day we made an appointment shortly after noon. We sat in a restaurant. Twenty minutes after we were there, three boys came to the same place where the girl I was dating was worried and asked us to leave suddenly. It became clear to me that it was because of the boys I didn't know, because it's not a big city I live in and I know a lot of it, not to mention the whole. We paid quickly and went out a little after us and they came out. We walked a few streets and a boy approached and asked me in a rough tone what I was doing with his boyfriend outside. I was stunned, I looked, and she looked at the ground and said nothing. I explained to him that she did not say that she had a boyfriend and so on. And he cursed at me and jumped on me to beat me with the other two. I defended myself as much as I could, and during that time she cried and prayed that I would not be beaten. I was just defenseless at the time. This did not last long, he told them to stop cursing something else I do not remember exactly what and told me not to approach his girlfriend anymore. Then he literally started pulling her by the hair and pulling her, which made me very sick and I was ready to cry not because I had been beaten, but for her it didn't matter that it was all because of her. I came home with a bleeding nose and bloody marks on my face. My parents are separated and I currently live with my mother who hardly cares what happens to me. And he just told me not to fight and left the room, but it's good that I'm on good terms with my grandmother who disinfected me. Then I picked up the phone to see what had happened and she had written me a whole novel about how she liked me very much and she didn't like him anymore and he forced her to be together. I didn't do anything, I just removed it from a friend and forgot about it ... How would you act in my place? PS: Please upload my story because I need advice.