How to get over a bad breakup?

My boyfriend and I had been together for a year and then just one month after we had sex. he just writes something on facebook that he liked someone else? I was shocked and he later I confronted them and I told them if they were dating? neither said anything but I knew they were cause his best friend told me. then the next day he calls me and says that him and the other woman were just friends and that I needed to wait for him and that he would contact me. One month later I was on facebook and his friend from where he works was telling me that Josh my boyfriend had denied even knowing me. So I took it upon myself to show a mini video clip of Josh's voice stating how much he loved kissing me. then I asked if he still thought that i was lying?? Well me and my big mouth! Josh calls me yesterday and tells me why the **** I was doing showing some video of him on youtube and how humiliated he was!! I said I was sorry and that I felt like I had no other choice since he was ignoring me and He then said that it was ******* over!! and toi not talk to him again and that he was out of my life and I needed to go my way and he would go his, and to live my life without him. He told me he no longer cared and I begged him to give me another chance. He said it was too late. Because I fuct up his life more than his own mother. I love this person with my whole heart. Ive never loved anyone other than him. I dont know what to do or how to win him back??? How can I get over this I am constantly thinking about it and am deeply saddened. I know maybe to find someone new. But right now there is no one on the horizon. Someone please help!!