Where does the broken piece go?

Its really hard to accept what the truth can bring you, have you ever felt that all the answer to your question simultaneously revealed and you cant handle it that your head will spin and you will just fall down and start to cry? I did and I can't comprehend whats happening now into my life. I lose the girl I love and I dont know what I will do cause she's everything for me, I know that the pain will last for weeks or months but Im not really sure if it will really just fade away like that. The feeling that she like other guy that she do things for him to be with him makes it harder for me, how I wish that there's a medicine that can make me forget everything I've been through the past 2 years. I really love this girl and I will do everything to win her back but now I don't have strenght to do it. Everything I know about her starts to crumble and replaced by other image, the other self of her. The question, the lies and the answers even the things I dont know in the past become clear to me. The people, the person there's always a relevance and the things that came into my mind that I refuse to believe is true. The jealousy, the pain and the uneasy feeling in past is what I really should feel when I feel that cause it is something she do that she dont want me to know. All the love, loyalty was nothing and it will not even help me solve things now that make me think I just wasted my time and effort but it is not. She made me happy, inspire me and make me do things I thought I can never do, she's the one who gave me strenght and continue to dream. But, now she's gone. How can I continue? I will start picking the pieces that she broke but how about the other piece? I believe its with her with her new guy? then how can I redeem myself?