Do I end things because I think he's immature or do I wait for him to?

I started seeing this guy......he's 29, I am 24. Has a job (working in grocery), an apartment (and 4 roommates), and a car. Seems like a really great guy. But here's my problem....I'm sensing a major maturity problem. There haven't been many serious relationships. He has lived with 2 girls that he met on the internet....which didn't work out. And he seems to have a video game problem. I'm all for people having a way to relieve stress, spend their time, whatever. But....he will play for 8 hours at a time at least without eating or leaving the game. I've seen him stay up all night because he was playing. He will blow me off and say he was sick because he was busy playing.

So....things between us have cooled down. My thing is.....I really like this guy and developed feelings fast, which werent one sided. But now I'm sensing he wants to end the relationship as he isn't contacting me or talking to me at all. Obviously he isn't going to end it the way he should, I've tried to talk to him about things and I cant get a straight answer. I've let him have his space or whatever the past few days. But I guess what I want to know is.....I don't feel I should wait around for him to break up with me and I think I just need to end things. But.....I really have feelings for this guy. So do I wait to see if he just needed time or do I accept I'm too mature for him and end things? (ME-No roomies, stable full time job, college degree, had serious relationships in the past, more life experience in general)