Boyfriend's new business is driving me crazy!?

I'm pretty pissed off with my boyfriend at the moment, he started a new business a few months ago and it's in his dad's house so he's running the company but at the same time having a laugh with his brothers and mates etc which means he's stopped calling me. He used to call me at least twice a day and now I'm lucky if he calls me at all. I usually cave and end up calling him but today I thought I would leave it and see if he calls me.

Needless to say, he didn't bother. So I rang him after work really annoyed, he's having a laugh with his brothers and mates and is barely concentrating on talking to me at all. I'm starting to think why should I bother when he obviously doesn't give a crap about me. So my question is to all you lads, if you really cared about your girlfriend would you call her everyday or just leave it until she contacts you? Should I be taking this as a sign that I don't even come into his head at all?