How do you help someone with league addiction

My friend is on this game nearly every second of his life while he's at home and it's becoming insanity at this point. He's on league from the moment he walks in the door home from work to the moment he goes to sleep at like 3 am then sleeps till he goes to work and comes straight home and the literal first thing he does is launch league up. He use to play a variety of games or at least take breaks to eat/watch youtube etc. but lately it seems like he literally eat sleeps and breathes league. I recently stopped playing and only get on when im really bored and play maybe 1-2 games before I got bored of the game and move on. Him on the other hand he can play about 10-20 games a day on average. Double that on days he has no work, he doesn't youtube or stream it either it's literally just all he does.

I've been trying to get him to take a break from it i've even bought him other games to try and move his interest away a little but he ALWAYS runs back to league and is on it all day it's ridiculous.