Stressed out and genuinely scared right now.
I got in a heated argument with a neighbor who might be a psycho and I'm afraid of the consequences.
I used to live alone now with my sister. A year or so ago this guy moved in the apartment block and acted all friendly. I let him put some of his shit in an annex I have even if I didn't particularly like the guy cause I'm a bit of a pushover. Since then I kept getting calls where I would have to open shit up for him so he can put more or take out something.
Yesterday I got two calls while at work that I ignored. Came home and asked my sis if he knocked on the door or something she said no and that a friend of hers was keeping her baby stroller in that annex.
Fast forward to this morning I wake up to her telling me that the guy saw her friend take the stroller out and demanded that he make him a spare key for the annex.
I got pissed and went over, knocked on his door and demanded he take all his shit out. I was angry and shaking and at one point he put his fist against my face and said he'd knock my teeth out. I said I'm not scared of him and proceeded to take his shit out. He took it to his apartment and said something along the lines of "this is not over". Again I told him I'm not afraid of him and went inside.
Now I'm afraid of the consequences. He's a very shady dude, totally atypical for the area I'm living in (he moved here from a bigger city). I've heard all kinds of rumors that he might be involved with shady people. He works construction so despite my posturing he can easily beat my ass up. Despite all that I think he's also a bit of bully/coward. I can read people pretty well when it comes to that. I'm not so much afraid of him doing anything sober but he might get ideas if he gets angry/drunk.
Aside from getting a firearm, which is not easy or cheap where I live, what can I do to prevent anything from happening to me or my sis?
Did you have sex with your sister
Once the adrenaline settles down for both of you things should look a little more rational. If there is a further incident you are just going to have to say yeah things got a little unnecessarily heated there, that you were doing him a favour, you can't demand your own key, just chill out.
Assuming that he'll concoct some revenge over this or is now out to get you seem either paranoid unless he is more insane that you are letting on. What is he going to do? Talk to his shady friends about how you were letting him keep some stuff in a spare room and now you aren't because you got sick of having to make yourself available for him? You said shady not dumb.
It sounds a little like you flipped your shit because you got the impression that he was being aggressive towards your sister. You got the idea he was threatening your sister, got a little worked up, chill out.