for a long time, especially after my dad died, me and my brother ****ing hated each other.
our lives had always been topsyturvy but it just got worse and at one point, within the matter of two months, my brother had broken my wrist by throwing me down the stairs and i had stabbed him with scissors so badly that he needed stitches and still has the scars to this day.
my brother is outrageously disobedient and praised and favourited by my entire family, which is partly why he's this way and mostly why i hated him so much for so long. all of my hate for him should've been aimed at my family members.
for me, it went away as i got older but sometimes it just doesn't, and that's perfectly fine.
family might be blood, which you can't choose, but me and many other people can vouch for you that you do get to choose which members of your family stay as your family.