If I haven’t heard from a guy in a few days, would it be okay to message him?

I’m trying to give him space and not appear clingy but I also would rather know if we are still cool and if he’d like to hang out again? I’m in a weird headspace over things. We haven’t expressed clear boundaries yet, I’m still wanting to get to know him... should I message him tomorrow or wait forever in case he might message me? Any advice would be great.
If I haven’t heard from a guy in a few days, would it be okay to message him?
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