I have a Friend...

So I have this friend who when i first started playing with, was great to play with and was very informational. Now, Over maybe a month or 2 of playing with him he has gotten on a very large loosing spree when playing Solo Q. Ive tried telling him to go back to basics; Cs, Roam, Warding, Objectives. except he is very Stubborn about it and wont take this as a learning curve. I love playing with him and i really want to teach him.

All his lanes are weak, but i really think his best is Top or Jungle( ). But he refuses to play them and wants to feed in the mid lane with . Or he has 40 farm @ 20 minutes. Or he makes other lanes loose because of going back into lane with 30% health as he jungles. All these minor things that not only sets the team back but puts the other team up ahead.

Basically my mind set is not to give up. Ive told him to go into customs and CS with and without champs. Ive told him to buy wards insted of boots if he afraid of getting ganked. Ive explained how re engaging with less then 30% health will never turn out well.

I know this is a hard thing to talk about, but how do i explain to him that he needs to go back and practice cs, ward, have the correct builds etc

if anyone has or is in a simular situation, please give me some tips or ideas.

Thanks Much appreciated!