I don’t think it’s callous for him to not give you cigarettes unless you do that reciprocally. Meaning, sharing with him when he’s out.

My brother and I used to do that when I smoked. Usually pick up a pack for the other. We were very close, however. I had no money when I was IP and he brought me cigarettes for five months. And Diet Coke. I helped him, too. We were good roommates when we lived together.

That said, my brother always had financial problems so if I gave him anything, I considered it a gift, not a loan.

I don’t think either of you are “at fault,” so to speak. You two don’t get along and sharing isn’t “mandatory.” IMO. I liked the poster’s suggestion about not running out.

They are very expensive. I hope that came out ok...take care.