Guys, would you ever make it clear to a girl you like that you just want to be friends? If so, why?

A guy who shows all the signs of liking me told my mom he wants to be friends with me when she asked what his intentions are. He also said "thats what friends are for" when I asked him to so something for me. He constantly praises my personality and looks, texts me, and approaches me. But his words say otherwise.
Guys, would you ever make it clear to a girl you like that you just want to be friends? If so, why?
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