Should I let my male friend know that my feelings are gone?

I confessed my feelings to him last week. After that, I evaluated myself if it's a phrase or not. I realized it was just a phase. I don't think it will hurt him because it's clear he wasn't interesting to me. I don't expect him to like me back, though.

I noticed something off about him. I'm not head over heels. It's just feelings so🤷‍♀️

he said "take it slow , no rushing. Let's see if we develop feelings "after I confessed to him. We are still good friends though.
Should I let my male friend know that my feelings are gone?
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