Break Up & Divorce

What do I do how do I move on?

2 years of our relationship... I fought with my parents saying he's the guy I will marry him. We fought for this relationship I put all my efforts and energy for this relationship to survive. Only to discover two days ago that he's polyamorous, and since I didn't allow that relationship he left saying I don't care about his feelings. He just left calling me old school and pointing out what he doesn't like about me. He chose himself and his needs over mine like every time. I still let it go and did things for him. But at the end he said he's not happy so there's no point of me fighting for our future and he left me. I can't process the breakup like this?
What do I do how do I move on?
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