AITA for not sharing my weed with the insufferable person my boyfriend asked to stay with us?

I got my medical card a couple of weeks ago and I bought a good amount of weed. I smoke weed all the time for my sciatica and fibromyalgia and I like to stay high when I'm home. My boyfriend just got a new job and I'm thrilled, but he asked me to let a guy he used to work with and his girlfriend stay in our spare room for the next few weeks. <br><br>I'm fairly introverted and the idea of having to be social with these strangers is exhausting, but my boyfriend convinced me because this guy is going to make a lot of money and he's currently struggling because he's moving. He promised that they'd stay upstairs and wouldn't bother me much. <br><br>We have a little SACO herf bong that we always smoke out of when we're at home. It's just a lot easier than bringing out the bongs and pipe and it's a nice little hitting piece. But whenever I pick it up, this guy always goes after it like he wants to hit it. I'm not a person that likes to share my weed, let alone my pipe. <br><br>I don't like his vibe. This guy is very unpalatable and it's hard to tolerate him. He barges around our house like he owns it and smokes in our rooms when my boyfriend is gone. But I'm sick to death of him trying to hit the herf and me telling him to get his own pipe and him going "oh, I didn't know it was your pipe." <br><br>I don't know what the hell he's trying to pull with me, but I don't want him hitting my pipe and I don't want him smoking my weed. My boyfriend has come down on me about not sharing my weed, but I'm not going to let this unkeepable person hit off of my pipe and smoke my weed.