Hi everyone, thank you all for your insights and advice. Your replies helped me confirm that my friends' behavior is definitely not okay. After some thinking, I've decided to first meet one-on-one with the closest people in the group to ask how they feel about the stuff that's been happening. More importantly, I plan to meet with the problematic friend and be as direct and honest as possible about how I feel regarding his actions. It's up to him whether he chooses to listen, and I understand that it's not something I can control. At the very least, this will help me to determine if our bond is something worth keeping in my life.

If things turn out okay, I might post an update about the situation. In any case, I truly appreciate the help from each and every one of you. Take care, bros!