How to say, "I like you"?

I am almost 100% sure this shy guy likes me. I want to find out for myself so I am going to tell him I like him. How should I word it? PLEASE help me out here!
"You know I like you, right?"
Vote A
"I just wanted/thought you should know that I like you"
Vote B
"Did you know that I really like you?"
Vote C
(I have a better one!) please comment
Vote D
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Vote E
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How to say, "I like you"?
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