I know you have a complete lack of rational thinking and cognitive processing, so I'm gonna break this down a bit for you.
Telling a chronic alcoholic that you're in an active suicide attempt will put that person into crisis mode, a version of flight or fight. People not used to that mode don't really have access to logical thinking.
So when you faked a suicide attempt in a bid for attention, it put him in the state of mind of 'I have to save her -> It has to be me -> I don't have keys to her place -> I'll have to break the door down -> I'll need a weapon to do that -> this flail looks like a weapon'. Now, I'll give him props, if I was him and you sent me a text saying 'i overdose plz help' I would have responded with 'lol, gl, ttyl', but he rose to the occasion in the best way he could. It was a series of bad choices on his part, absolutely. But he did the best he could with the agency his illnesses allow for.
This is your fault.