Namechanged as don't want people I know to read this thread.
I split up with my son's dad about 2 years ago when he was 15. He wasn't very happy and showed anger towards me and wanted to live with my ex. He also was drinking alcohol when he was 15. He seemed to get better though and got with his girlfriend.
But recently he's been rude etc to me and son (8). Today he came back from college and as soon as he got home he was shouting at Ds2 and telling him he wasn't allowed to play minecraft because it's his (it used to be but my son gave it to DS2 as he doesn't play it).
Then he started shouting at me because I asked him what's wrong with him and he said nothing is wrong with him it's me. And he's gone out.
I'm not sure what to do. Advise please