Betrayed...

Hello, I apologize for my bad English but i can't write very well

me and my girlfriend were 2 years together but recently I discovered that she cheated on me 2 times. We were in a long distance relationship since November only one month apart.
She told me that I could trust her and that she would wait for me, but yesterday i found out that she started talking to the guy with whom she betrayed me and that she was flirting with another guy... and aparently things were getting serious between them. We had a big fight and ended the relationship. I told her that i never wanna see her again. I threw all the things she gave me away, deleted every picture of us, blocked her number and facebook. I knew that she cheated on me once but i forgave her so I guess it's my fault....
She lives in Portugal and I live currently in Luxembourg and now I am going to stay here because I have no reasons to go back now.
But what I cant understand is how am I supposed to move on, forget about her and not talk to her when she once meant the world to me... I just can't do it. I know i need time but I don't think this will change. I can't understand why she did it I mean I never lied to her, did all I could for her, tried to make her always happy and never treated her bad.
I have already read averything abbout how to move on but i don't thonk I can do it.. it's just too much pain....:sad2::sad2:
She always told me that she loved me with all her heart. When I met her I would have never imagined that she would be someone who would cheat... everything was perfect but now i know that these 2 years were a lie... and probably nothing was real.. she told me that it wasn't a lie that she still loves me but i just can't believe that. I feel like this is my fault maybe I wasn't good enough for her... What can i do to make the pain stop?... i mean i don't even see the point in living any more... I mean how am I supposed to forget someone who meant the world to me?

Thank you in advance...