How do I move on from her?

Anonymous
Three weeks after I told my ex it's best to cut contact because I noticed how distant she became, and she wasn't willing to discuss it whenever I brought it up, she acted clueless, despite knowing she had met someone.
I still miss her terribly and have the urge to reach out, but I know it's a bad idea.
How do I rid myself of this feeling in my heart?
How do I move on from her?
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