I can't swim! Should I tell my date?

It's so embarrassing.. I'm 20 and I can't swim. I'm afraid of water. Yesterday I was on a date with a guy who loves swimming all over the world. I'm afraid he will arrange something in the water. I'm also afraid he will never see me again if I tell him, but I think he should know.. It's so so embarrassing.
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Thank you for your kind replies everybody
I can't swim! Should I tell my date?
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