Does this sound like something?

Lately my fiancé is having issues. He thinks everyone is out to get him, everyone hates him. He has very low self esteem and is obsessing over work. He tried to leave our group of friends because he thought we hated him. I had dinner with them while he was working and he genuinely thought that we were doing it to hurt him. He definitely has some anger issues and adhd but his behavior is making me think that something more serious is going on. Does this sound familiar to anyone?