I need helping saying sorry to someone.?

okay so me and one of my close friends had been arguing for a while... i had gotten a boyfriend and stopped texting him cause my boyfriend didn't like him at all.. (which i know was wrong cause a boyfriend is temp. most of the time and a friendship is more important) well he gets totally pissed at me and blew my phone up.. and was so mad at me for not ever texting him back.. well we had gotten over that.. and the other day.. i was at my other friends house and i text him and he never replied but he was replying to everybody else in the house so i get mad and chew his face off.. and he said he was going to reconsider our friendship.. and i told him to go ahead i didn't give a f*ck and then he said our friendship was over.. this has been about 5 days ago.. and i have tried saying sorry so many times i have cried and cried and cried to myself.. i really miss him.. and he wont forgive me or give me another chance.. i really just need helping telling him sorry and advice on how to get my best friend back.. all help is very much appreciated(: