For context behind my dad and my living situation: I am currently doing odd jobs while looking for an official job. For now, I'm living with my grandmother, which is his mom, and my dad is an unemployed 46 year old grown manchild without a job and no money. He hasn't had a job in years. So anyways, When I get paid, I try to stockpile these psychedelics I found online. I use them for a new perspective on things and it helps a TON with CPTSD. They aren't expensive at all, I can well afford it. I use them once a month for therapeutic purposes and my dad knows about it. I made the huge mistake of sharing them a couple times with him and basically he wants around 50% of what I have. He just wants to take what I have just because I have it without giving ANYTHING back. He will start saying things like "You should give me some." "I wish I had some of those things we had a couple days ago. That would be awesome." Like, trying to tell me he wants some without actually telling me he wants some. When I used to just give in, he ate half of my stash and I didn't get my moneys worth out of it and I just wasted my money. Now that I have told him he can't have any, he'll say "but you have plenty of it" or, "you could always buy more, it's cheap." And pulls the woe is me card again and paints me the selfish one. It's gotten really fucking old and invasive. Here's another example of what his behavior was in the past. I don't smoke weed anymore but when I used to have weed, he would always ask for hits and he used up at least 60% of my cart and it was gone in 4 days. I noticed when I would hide it from him, it would last well over a month. When I told him he couldn't have any, he whined about it and would say "what's wrong with you?" or he'll say, "oh so you're holding out on me huh?" Like it was also his. And when he talked about weed that I bought with my own money he would say something along the lines of "that weed WE bought was great." I'm not in a good spot to move out just yet so that makes it worse. I can't really hide it from him cause number 1, all my stuff comes in the mail and he knows the name of where I buy it from and I don't have another address to send it to. Number 2, you can't hide a trip from someone. Number 3, he's a drug addict. So with that being said, am I being reasonable by setting a boundary by telling him he can't have my shit, or am I actually being a selfish asshole like he thinks I am?