I (16 F) have two siblings R (18 M) and G (13 M) and I honestly hate G. I feel like this is juvenile of me because he's young but he is horrible and spoiled. I cannot get a word out around him without him immediately mocking or making crude gestures at me. I constantly call him out and he looks through me like I'm nothing. My parents do nothing about it. He talks back to everyone and truly has a God complex. G only does things for anyone if he gets something he wants I'm return. I'm afraid that this is all because he's a kid, but R and I were never like this, and we're all similar people. I feel like I am such a horrible sister, but I just can't with him anymore.
Does anyone have advice on how to handle this or simply just live around it? This is killing my mental health.