It means he's gay thinks you're gay and wants to date you. Or(if he's your friend) He's joking around. Probably...
But i think if you are a girl, and a guy tells you this, this probably means that he likes you :)
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It probably means he's into you. If a guys says you're cute he thinks you are funny and nice and pretty and a lot of fun to be around. and maybe he wants to really get to know you