Is it normal to not be over someone u only dated for a little over a month?

It’s been two months since the break up I still think about them everyday. And there's been no contact between us. I always get told by family you two only dated for only a month but we spent pretty much every day together. It’s so hard to forget them. Is something wrong with me?
Is it normal to not be over someone u only dated for a little over a month?
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