So I used to have this bff we have been bffs ever since preschool this happened around freshmen in high school and he met a g****** the internet which she was in the 4th grade and he told me about her and I said to him that he was too young for her and maybe it’s not a good idea to be dating a girl that young, but he didn’t listen and changed the subject although I was concern I just dropped it, I have never talked to this girl before but my bff shared their chats which was very s***** and shared pics of her but luckily they were just selfies of her, but their chats really threw me off my bff was calling her ‘mommy’, ‘baby’ and ‘baby girl’ this really grossed me out and the girl said to him that she was uncomfortable but he didn’t listen, so after reading their chats I said to him to stop because he’s making her uncomfortable but AGAIN he didn’t listen, and then a few weeks later he added me in a group chat with her and her bff and I was pretty excited that I finally get to meet her, we introduced ourselves to each other and she even mentioned that my bff talked to her about me so she was familiar of me which I thought was really nice, so we chatted for a bit until the topic of her and my bff’s chats got mentioned, she told me that my bff was making her uncomfortable and I told her to stop talking to him and block him, she liked the idea and blocked him, then my bff got mad and asked my about it and I told him ‘dude you were making her uncomfortable and when you first told me about her I told you that she was way to young but you didn’t listen.’ but instead of apologizing to her he got mad and started an argument in the group chat! he started telling me how I don’t have a dad, and that my mental illness was ‘fake’, he keeps shouting insults at me AND the girl and at that point I had enough I argued with him for a few minutes until I finally left the group chat and blocked him. I haven’t spoken to him since.