I love this guy so much but he dont love me anymore.this new year hes with another chick,its really hurt.?

hes everyhting to me and i ever wanted to be with him for good,then suddenly it went all wrong,he cheated on me many times that i dont know,i just find out thru his email.now i find out that he buy a ticket for other girl to come to his housed and spend the new year with him,itr really hurt,for me bec.i thought its only me the girl in his life,i really love him,but i should finish this situation,im always thingking of him,all the things he did to me,its like a nightmare to me evrynight,i gave evrything but he hurt me alot emotionally and mentally,how i can move on..pls help me