Drama in highschool dont know what to do?

[Gigglebyte]

okay so was dating this guy for a year, he was everything to me he was sweet, like the best boyfriend a girl could ask for but things started going wrong at the end of our relationship, in our anniversary he told me to shut the he ll up cause we were fighting then later on he calls me a b it ch because we ere fighting about how he couldn't control what i wear, and then he gets mad because im hanging out with my friend and won't talk to him as much, i didn't want to be with him after the bitch thing but he always makes me feel sorry for him telling me how hes going through a difficult time with his family and i always felt obligated to date him and feel happy when i didn't, so during that time me and another guy started talking and i started liking him and i knew it was wrong for me to talk to him while i was still with my bf but i didn't feel the same for him any more the love i had for him dissappeared when he called me a bitch but he made it hard for me to break up with me he alwys has, so on new years me and my bf finally broke up but then like a week later he finds out me and the other guy were talking while me and him were going out and he called me a cheater pretty much yelled at me at school and made a big scene abt it, i never cheated on him sure i talked to the dude but never did i kiss him or touched him or anything like that, and he basically started crying and telling people how i cheated on him and how his mom is really sick and doesn't know what to do, now at school everyone thinks i cheated on him and im the bad guy in this no one knows my side of the story only his and i told him how that was wrong of him and he said he was going to changed that because he now knows i never cheated on him but that won't changed anything the damage is already done, and now i lost all of my friends because of tht because one of my closes friends like the guy i was talking to and i knew she liked him and she got mad at me but i told her myself that i liked him but she made a big deal out of it and got all of her friends against me even one of her friends wrote to me how fake i was, when i specically talked to my friend and said sorry to her abt it, so now im dating the guy i talked to b4 and everyone thinks its wrong of me to do so, idk what to do anymore i just want to be happy but everyone hates me i have no friends anymore my ex hates me which was the last thing i wanted, he was so sweet to me but at the end he just thought he could say anything to me and i wasn't going to put up with it now he earsed me from fb but i can still see his profile and he writes how hes still the same and im the one who changed and that hes only going to be happy now,, it hurts me to see what happened because of this it really does and i have no one to count on because everyone thinks that what i did was wrong, im only fifteen going to be sixteen soon i never wanted all of this never did and my ex is 18 and my new bf is 19 incase u guys wanted to know. please tell me what to do,i saw my ex with the girl he used to like b4 getting with me and it hurted it really did but im trying so hard for that not to get on my nerves since i have a new bf but idk theres so much i can take... i can't mke everyone happy i want to make myself happy but when i try to it blows up on me and everyone htes me for the decesion i took even the friends that weren't in this turn their backs on me, im to the point where i can't take it anymore and about to break down,,please help
sorry for the grammar. it's very long to explain everything and i messed up on some words, so please be quiet and answer the question,