What to do when you're going out with your guy friend (just you two) to show him that you want nothing more than a friendship?

there's this guy that confessed to me and I said no and frienzoned him nicely and his friend is trying to get closer to me, he's a nice guy he's 19 too and we're getting closer , how should I show him I see him as a friend and nothing more

because I hate it when they confess and the friendship gets ruined

should I even go out with him?

they're both my classmate and I'm 23

What to do when you're going out with your guy friend (just you two) to show him that you want nothing more than a friendship?
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