Gaming addiction?

As
My SO is addicted to league of legends.. He got fired a few months ago because he was late from playing this game all night. I left him months ago and we just started talking again. I normally wouldn't have a problem with my SO being a gamer, I too am a gamer and I enjoy playing video games with him!! But he has a SERIOUS addiction. Day in, day out, league of legends. He knows he has a problem but he doesn't want to be helped. He's too stubborn to take my advice or do anything about it. Ever since we started talking again, he toned it down a bit for my sake but he is still plays for hours on end. I used to play with him but the game is repetitive and boring if you play it more than two hours. Advice? Suggestions? Should I just finally give up?
Thank you, ladies! :)