Fake guys

So I am only 13 and my really good friend I call him my brother who is in a gang lives all the way in Cali but I live in Chicago. He introduced me to some of his friends and one of them are texting me and a little bit later he is like you wanna get dirty and ask me if I want a free orgasm I am like omfg. I have the dumbest idea of letting my friend text him and things get out of hand now he wants a pic of my vagina. Being the good person that I am I say it was just a joke and my friend was texting all of these things to him Later he says wowwwww and ask me if I still want to do it I say no and now he won’t talk to me what do I do.