I have a friend whom i consider one of the closest friends I have but the guy is talking to a girl. Which makes him begin to favor her over his friends(i know its kinda normal but he took it to an extreme) like we could hang out and leaves me to go with her or leave an online match to chat with her or even ignore me when i need actual help to spend some time with her, what should i do its a shame because ive known this guy for so long, i talked to him and told thats not cool but he just started insulting me(she treats him poorly btw). but when i actually dont talk to him he comes to me and tells that im not a good friend which i am( and im not being narcissistic). I feel i tried everything what should i do.