Should I break no contact and reach?

It's been 1.5 months since they ended things. 1 month of no contact now, but now it feels too much. I want to tell them how incomplete I am without them. Although, they cheated on me since they broke up after coming into contact with other person. But, she was my life, the reason that I was happy. Nothing feels right without her. No motivation, no enthusiasm, I feel dead. I know she won't accept me even if I cry in front of her, bht that's what I want to do. Fours years of promises and everything, and one day she told me she is done, that I drained her emotionally. I don't know, I now only can think about those times and try to find out what I did wrong. The one person who could not live without calling me once in a day... it's been 1.5 months, and she doesn't care. I have given every ounce of my energy, still I am here weeping and crying. I want myself to get over her, or I want her to come back despite being aware of the fact that she slept with that guy. Pathetic me. I feel pity on my own self. I will never make myself this vulnerable again, just this one time, if God give me the strength to move on.