I live with 3 other people. 2 are lovely, 1 isn't. I got a message from him the other day accusing me of being selfish because I had the heating on when I was home alone and basically saying I wasn't allowed to. He also accused me of being messy in the bathroom (I'm not). I've asked my other flatmates and they don't have any issues with me.
So I told my therapist in a phone session in my room about my crazy flatmate. Guess what? He overheard the whole thing and then had a go at me later for slagging him off. My room is next to the bathroom but there's no way he could have clearly heard unless he had his ear to the wall. I think he was outside my (closed) door. The whole thing is just creepy and invasive.
Basically how do I deal with this? I was so pissed off I didn't say anything when he confronted me. Part of me just doesn't want to engage with him anymore as it just makes him angrier and it'll make things worse but the other part thinks he needs to be told what he did was wrong (even though I know it won't sink in).