I Am a Sensitive Person

Today my sister and her boyfriend came over. He wanted to hang out and do perler beads.[c=#BF0080][/c] everything was going okay but he was quiet. Sometimes he gets quiet because he has anxiety and depression. I relate to that because I also have anxiety and depression. Well I guess she has been tired of him since last year but she's still with him and last night she said she broke up with him. The whole time she was over she was facetiming another guy in front of all of us, including her boyfriend. She talks to other guys online and he doesn't seem to have an issue with it but last night since they broke up I'm guessing it triggered him. I can tell he was being ignored I felt the energy in the room. Well he started crying because he felt sad because she was saying how she lost feelings for him. He was saying how he loved her family and her. He was apologizing to us too, I felt sad and uncomfortable at the same time. Her bf mentioned the guy on the phone and said how she knows he loves her and that he felt like it was messed up. While he was crying my sister was laughing and smiling.. she says how he always does this but meanwhile I was crying because I felt so bad for him. He was having anxiety before this all happened and turned to me, I gave him water and put a fan on him. I felt like my own heart broke. I'm not sure if I was crying because I'm emotional from starting my period yesterday or because I'm actually a sensitive person. I know this whole situation is messed up.. Do you cry when you witness stuff like this?