How do I understand Ni (you) character correctly? It says 



http://zhongwen.com/bushou.htm

If I search for you I got this

It consists of 2 characters

The first is person and you. The 2 characters are very different than the character in character ni. I supposed the ren is in alternate version. I wonder what's the character next to it.

It says there that the character next to it is you.

However, clicking it says it's the character er which means breath.



Of course, the character breath itself consist of 2 characters.

The upper part is ru (enter). And below we have number 8 pa divided by vertical line.

How wrong I am? Please correct me.

Any idea why letter 8 under enter becomes breath that combined with men becomes "you"? Any website that explains this?
Outlier


  FORM
  你 consists of 尔 (a shorthand form of 爾 “you”), and 亻 (person), indicating the original meaning “you.” 尔 also gives the sound.
  [Reference, p. 1253]
  
  COMPONENTS
   亻
  In 你, 亻“person” is a meaning component, indicating “having to do with people.”
   尔
  In 你 nǐ, 尔 ěr is both a meaning component and a sound component. It is shorthand for 爾, an ancient character that meant “you” (among other things). The sound connection between 你 nǐ and 尔 ěr is not obvious in modern Mandarin.