How do you fix a broken heart?

my heart is in pain. I realized my guy doesnt want to be with me anymore. I chose to go to singapore to pursue my dream career, leaving him behind. Ive been super faithful to him but the damage is done. I can't salvage this relationship anymore. He's resolved to move on. I really wished I can have both. A career and a love life. I guess I can't have everything. And im hurting. How do I fix myself?
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