Guys opinions only please i need HELP to understand this circumstance ?

OK i like this guy in my grade , but i never talk to him, and he doesn't like me at all . my friend knows i like him , and told me he said to the class in English to everyone who wants to see my dick . I messaged him on face book saying i do he said why i said cuz i do i said i wanted to do ****. i said can we **** he said no i said can i suck your dick he said no then i said fine ill just go back to my other guy then . another day came, and i started to have a convo with him it went fine, and i asked him if he was going to homecoming cause im bringing my sister Olivia you should go he's like im not sure i know who that is and i said livvia privee i said yeah he said yeah shes mad cute i said i know . he said have my sister text me or i wont talk to you and so i did told her to text him cuz he wont talk to me if she didn't so i told her i like him so she wont flirt with him and so on . anyways another day goes by and i saw that he clicked liked on her picture i got mad cuz i was jealous and messaged him arguing with him about that . and he wouldn't talk to me so i pretended to be my sister texting him he kept asking for a pic decent . blah blah blah and so i kept saying Krista will send you a pic she doesn't care so i sent him a few pics of me bra panties and naked and one with a dildo in my pussy . he said nice not bad you should at least take your bottoms off and that i should make a video i said well that's not gonna happen. the next day at lunch at school he said something to his friend and his friend called my name . the guy i sent the pic to said no don't when his friend called my name. and the guy i sent my pic to sent me one to but doesn't want anyone to know when i was leaving school later that day he saw me walk by he spun around and was starting at me. he won't even look at me now. and all he knows is that dcf makes me go to alcohol class for 3 hours. i did **** once with a 22 year old whose married with two kids he knows he wants to **** me and that Ive been with two of the guys brothers that was married (younger) but not married and he wont talk to me anymore why would he spun around and star at me when he saw me walk by and he didn't like me from the beginning and when i try talking to him still afterward he says go away ? WHY.....