What does the boy mean when he says i like everything about you?

Answer 1

If a boy says this to you, then you're a very lucky girl/boy
because it's not everyday that someone likes EVERYTHING about you
I think this boy simply meant that he doesn't want you to change
and he doesn't want you to try and impress him
because you obviously already have, just by being yourself

Congratulations :)
This is a sex thing. For some reason, female humans apparently often say something other than what they actually mean and are terminally confused by the fact that male humans usually dosay what they actually mean, leaving the females insisting on looking for hidden meaning even though there isn't any.
Seriously, girls? Assume we're like Horton and we meant what we said and we said what we meant, and you'll be right, almost 100%. (We may deliberately lie to you, but that's a separate issue.)