That happened with my friend I grew up with. Little bit after high school he got into some heavy d****, selling and s*** and it changed his personality big time

But few years later he got clean and back to normal . we boys again

My best friend was flirting with my ex and talking s*** to her about me behind my back. I found out because she ended up telling me, he tried to fight me because he said I was accusing him. He embarrassed himself that day because I got the screenshots and apologized to me and I just dropped him. Blessing in disguise

I just leave em be till they confused on what's wrong