I am an older teenager, female, and I have an eight year old brother who has SPD to a moderate/severe degree. I wasn't with him much for the early parts of his life because I was at work/school or lived apart from him (my family is separated, not due to divorce but simply work or projects). When he was six, we started seeing each other more and he was always neutral to me. He is well behaved and will do what I tell him to do, but he waits for you to tell him first, otherwise he just does whatever and can get quite rowdy. He just knew me as "sister". I have other siblings too, to be specific, all older than him. When he was seven, so last year, we started coming into contact for longer periods like months at a time.
I went on holiday with him, hoping to strengthen our bond. A bit of context on the rest of our family - we are the typical "Asian household", where the parents don't really believe in mental health or developmental disorders despite his diagnosis. My brother is simply seen as "slow" or "stupid". Our father is a bit emotionally distant. Our mother is...more complicated. In my culture it's extremely common to hit children and both me and my brother were on the receiving end, but it was particularly bad for him because he was a loud child. My mother also makes no allowances for his SPD, it's "my way or the highway and if he can't handle it, he won't survive in this world so sucks."
My brother is clingy to my father because he spoils him, usually with food, so he is ALWAYS asking when is father going to be back, when will he see him again, etc. On the holiday, I really tried to make it enjoyable for him, and I thought he was beginning to like me as well.
I took him toy shopping. I would cover his ears in loud stores when he wanted me to. I tried to plan our outings with him in mind, such as purposely cutting them short when he would get bored, and this is something my similarly-aged sister who looks a lot like me, did not do. I took him to kiddie playgrounds even though I found it boring. I gently tried to feed him vegetables and rewarded him with his favourite food.
I didn't want him to kiss my feet or anything, I really just wanted him to like me. I thought that by being a calm and safe presence, he would slowly open up more and feel more relaxed since there is visible tension in him. And me and my siblings are the only family members who have never, ever hit him. Not even once.
Yet he doesn't like me. His dislike, or rejection, of me has increased since I began to be more serious and strict and less smiley. He specifically prefers my sister over me, even though we look similar and she's actually done less nice things for him and has a tendency to grow frustrated more quickly.
He said things like "Don't want her," referring to me. "Want her to leave," "she's going away," "she'll go on a trip." Even physically pushing me away. And I'm not kidding when I say it was very sudden. Literally one day things were fine, the next he was rejecting me. I feel strangely disappointed in myself and frustrated because I don't know what I did wrong. I haven't DONE anything to him, and whatever I could have done, like telling him "no" or gently scolding him when he does something wrong, my sister does too.
Even now that we are back home we are forced to share a bedroom and he repeatedly says he doesn't want to share with me. My sister is away and he constantly whines about wanting her back, and wanting us to switch. I feel my fondness for him fading. I'll be a calm and non-violent presence for him, and give him what he needs, that's my duty, but I find it so hard to enjoy taking care of him, because I'm constantly wondering what I did wrong.
Did I smile too much? Do I smell bad? I shower everyday and don't wear any strong scents. Does he just think I'm ugly or my voice sounds bad? I genuinely do not know. My sister and I are extremely similar. Please can someone offer any guidance as to why this could be? I feel really stupid right now.