Really, depends on the guy and depends on how much he likes you. My boyfriend called me every day, 2-3 or more times a day before we got together (still does, in fact). But before him, I was talking to this other guy who liked me but only called me once every week or every other week. He was just kind of shy (which ended up being his loss, b/c I met and fell for my boyfriend).
If you think he likes you, why not call him every now and then? Or if you're getting off the phone with him, ask him if he'll call you the next day or next week or whatever and see what he says? If nothing else, his response might clue you in as to why he doesn't call ("Will you call me tomorrow?" "Oh, I can't. I'm going to be super busy at work with this project I've been working on for 2 months now. How about next week?"). If you don't think he likes you, they why worry about why he doesn't call? Move on! Good luck either way!
at 6:33 PM on Dec. 20, 2009