Do yu think this weird or wrong?

I'm 13 and a girl. Some night I have trouble sleeping like I have nightmares. After I wake up from them it's usally about 3 am. I can't get back to sleep lying alone in the dark. I go and sleep with my older brother who's 21. He let's me because I told him what was happening to me. in the bed he sleeps on one side and I sleep on the edge of the other. He has a really biig bed. He usally sleeps in boxers or naked. I sleep in knee lenth pj shortS and a t-shirt. Me and my friend were talking about knight mares and what we do after them. When I told her that I go and sleep with my brother she told me that she thought that it was weird and wrong. Do you think thatit is weird / wrong?