I NEED HELP...

Hi everyone...my name is Kavya Kaushal and I am 13 years old. I am a first generation Indian American and I love basketball. I have a lovely family consisting of my parents and my twin sister. Something is wrong with me. It all started in 7th grade early 2017. I have a couple best friends. I was friends with this guy who had terrible history with one of my best friends. One day, he texted me sending me screenshots (the ones below) and I was really hurt. I asked who said that about me and he said it was that girl he had history with....my best friend. Ever since then I have been super insecure and everything. I confronted her about this whole thing, and she started defending herself and saying she's depressed and that she wouldn't change because of something I said. She is still my friend and it hurts me when I see her acting as if everything is okay when it's not. I can't do anything because we are family friends and her family is so nice. I am not letting her change our entire relationship with my family. Let me tell you, this is not the first time this has occurred. Time skip to June 2017, end of 7th grade, I had a guy friend, who I didn't/don't like might I add, but who was like a brother to me and we were really close. He didn't eat food that often and I loved food to an extent. When he mentioned this, I was obviously super concerned for him and I started getting weird thoughts. I had a thought that if other didn't eat, why was I constantly eating my life away and kids are starving globally. I stopped eating that day and later attended my 2 1/2 hour basketball practice. 1 hour through training, I rushed to the bathroom and threw up blood. I don't know why it happened but it did and I continued dieting, I lost 7 pounds in that month alone and it was just 12 days. My mom and dad were constantly worried about me and kept me under close watch. So summer went on and school started soon enough. I started losing interest in things I was doing and continued spacing out. Although nothing really bad has happened to me, I constantly have thoughts about ending my life which is really sad. I have panic attacks really often but I don't tell others it happens because of panicking and stressing out (my anxiety). I claim it's because of "headaches" and due to this my parents think I am dehydrated. I am trying to call out for help but no one is taking any hints. At school I am super social to hide the fact that I am insecure and at home I am silent and shut everyone out. I don't know what is happening to me but I really need some help. I went to the doctors for my annual visit but didn't have the guts to ask my mum or my sister to leave the room. As Indians they would probably kill me. I can't tell my parents as they would not support me in this. I have panic attacks, I change my mood a lot, I am constantly sad no matter what and at times I want to end my life. My parents are concerned and think I am going crazy.

Someone give me some advice please I would truly appreciate it..

- Kavya Kaushal