Boyfriend and his stupid game

Erica
There's this game on my boyfriends phone that he plays ALL the time, it's not like a normal game that he picks up for like half an hour and then done with it for a few hours. He has it in his hands for hours on end everyday. 
And ever time I ask him to lay it down for a little while he'll come up with an excuse as to why he can't. 
Like there's an event in the game so I need to do this, or someone needs my help, or I'm just talking to this person in the game, or just one minute I'll lay it down in a minute. And then he picks it up again shorty after!
I don't know what the game is called, it has something to do with gangsters or something. 
It's not a normal game, it's like consuming his life, and I hate it! Every time we cuddle he's playing it, or when I'm trying to talk to him, or really when we do anything. This stupid game is literally getting in the way of everything. 
He's been into other games before, and I didn't mind it, I didn't care at all because I play them too. But this is crazy, he's always on it. 
What do I do?