Broken heart

I loved someoen for four years and he loved me too I think now. He actually lives in another country so I told him wait until I finish my high school we will get married he said ok he promised. He said I wont leave you till I die. I loved him more than anyting in the world even more than my life. Sometimes we didnt have contact because he made me sad or I made him sad but I always went back and apologized for making him sad and tallked with him again. But for the last two months we didnt have contact, I thought he might come back he blocked my id and never replied, but I just heard that he got engaged and he is getting maried next month. When I heard this I was shocked I didnt belive it. I called him and said what is going on why you played with me. He said my promises was wrong my love was wrong I got a beautiful wife now I dont need you, your a dirty girl. I was crying in the phone it was midnigt and he was loughing. he still lied to me he said he is stil single but doesnt love me I said then im ready to marry you tomorrw. Dont give me this punishement I diddnt do anytign wrong I just loved you. after some days I heard that he is preparing for his marrige and now I dont know what to do.I can’t take him out of my mind I even got grey hair because of thinking about him all the time. I lost hope and I dont now what to do and how to forget him