I haven't heard from him in a week, is he still interested?

I've been dating this guy for about a month. But, it's been a week since I've heard from him. Granted I know I can call him too. But , last we spoke he said he would call me the next day so I waited. However, last night I gave in an called. I left a voice mail. I know he's busy with work. He manages a bar and grill and currently he's the only manager and they are low on staff so he usually works every day except Sundays. Everything really has been going fine. We do live 4 hours apart, but he's made it clear that it's not a big deal and if we want it to work we can. I know he's not laid up in a hospital because we have a mutual friend that he works with. I just don't get it. Last time I saw him was a little under 2 weeks everything was cool. So this is all very strange.