How everyone treats me like a outsider

Hi am alora 17 i'll go straight to the point my family loves my older bother so much that am left out my brother screchs me and my parents do nothing he throw my phone across the room twice and my parents did nothing they got mad at me for it.and for my friends i thought they were true friends but no my best friend stole all my friends the reason that someone will talk to me is bc about her at lunch time im alone and she said im a mistake and annoying its always about her amd my brother its like im a ghost heck i dont remmber the last time i celebrated my birthday