<human>: My brother has a problem with pot. Yeah yeah, "pot isn't addictive." Doesn't matter, he has a problem. He is high every single day. He told that to my mom, straight up. She simply said "I don't know if I can accept that." And he flipped. Violently yelled "fuck you", broke a door, screamed "fuck" over and over. This happened before, unrelated to weed. He punched a hole in my door, and two in his. It was terrifying. I was in the basement, but I heard everything.

Since then, they've "smoothed things over." Meaning, she'll try to turn a blind eye, while he does nothing to make us worry less. He doesn't smoke to much, it's our fault for not liking it. He's noticed that our relationship has slipped. We were so close, but then he went to university, and he came home for the summer and I couldn't relate to him. ALL he talks to me about is how "fucked" he got the night before. I try to change the subject, but nope, he steers it right back to partying. I'm a junior in high school, also at the bottom of the "food chain" of school. It just makes me feel kinda shitty for him to go on about how popular he is, even after high school. He never used to do that. He used to be a good friend actually.

He thinks it's fine. I thought it was too, that he's just a stoner now, he'll grow out of it, but I've never seen him so angry. It scared me. I want to help, but I don't want him to flip. I don't want to push him farther away. We have an unspoken brother-sister pact, that we will always stick up for one another when the parents get mad, but I can't do it anymore. He treats me with no respect. Nothing is his fault, it's ours for not relaxing.

I just miss the boy who loved reading, and Lord of The Rings, and who would talk to me until two in the morning, and would always tell me "if any boy tries to mess around with you. I'll knock him out."

Can you condense the text into three sentences or less?
<bot>: We were best friends growing up. We could talk about anything. Now I don't know him, we can't help but start to turn our backs, but it's from no fault of his own.