What's a breakup like for guys?

My boyfriend and I recently broke up because we felt our relationship was getting colder and colder due to long distance caused by Covid. I think for both of us it's a chance to think rather than an actual breakup although we said goodbye.
My question is how do guys usually feel in the first days after a breakup. What's the process like for you?
I'm trying to understand when he'll get to the missing part or actually thinking about us.
What's a breakup like for guys?
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