grammar - "no one" vs "no one else"

Can anyone please tell me if I should use no one or no one else in the following sentence?

Here is the example:

• John is a very good friend of mine. No one (else) likes me more than he does.

I think no one likes me more than... means no human being (including john) likes me more than john does. So I think I should use else.

Answer

No one is correct. John can not like you more than John likes you therefore saying no one else is insinuating that other than John, no one likes you more. Therefore stating that John likes you more than John does, which is impossible.