I've been being told to kms alot recently and it's ruining my mental health as well as other things

Me and my best friend of 7 YEARS ended friendship and all she really does is repost videos that make fun of me and never wants to be around me, if i talk to my friend who is bffs with her she'll lead her away from me leaving me with no one.

I had this reddit gc that was my comfort place, AND NOW ITS GONE. every other gc i feel unsafe in and overly sexualised even though I'm just 13. Stuff like being sent a dick pic and then the person who sent it to me lying about their age to seem close to mine to try make it okay even though I get uncomfortable with sexual stuff, also was told to send a pic of my parts IM JUST 13, I say "I'm not comfortable with this please stop" and their response is never to leave me alone, its just to try to make excuses to why they should be allowed to send me dick pics or have me send them picks of my parts.

I've been told im a burden and to jump but I'm going to try not to; I'm going to hope life gets better before i even attempt it once again.

I dont know what happened, I genuinely cant access my comfort gc that i trust, EVERYONE there are people are trust and I know they will forget about me like most of my friends. I have a group chat of friends (irl) and I'm not sure if i can even trust them enough to say how i feel since they told me they told someone who vented to them to keys and I feel if i end im venting, I wont even be able to call myself apart of the gc anymore. When I am alone I often get made fun of and if I leave my friends (Which I don't want to since they r my ONLY friends) I know i will get bullied for my appearance and for being a quiet kid