Loving each other when you can’t have each other

22m. I’m in a situation with a person where we both love each other, care for each other, know each other, understand each other better than anyone. But we are just not meant to be together and we both understand it and admitted it. Just agreed to never talk again, and said our last goodbyes and wishes. Im just shattered, feels way worse than a break up. I know that it’s over and that I’m gonna live with it, question is how? What’s the first step? How do I stop myself from crying, I have so much anger boiling inside of me that I want to let out even tho no ones at fault. I’m lost like never, that was my only person that knew real me. I can never imagine having anyone as unique as her, she was always special and could never be compared. I seriously need help, if there’s anyone that’s been on this path and got over it, please share your stories. Is it even possible to forget her? Or at least not have her in my head all the time. I’m so down now, I haven’t slept for over 40 hours and I’m definitely not sleeping soon, got work in a few hours . I am suffering, looking for hope.