Why does a guy ignore his girlfriend?

I think that the reason is that he is so stuck on himself and alls what he wants to do is impress his friends. He may not really be into her at all. Because he is immature and isn't man enough to tell this girl that he isn't interested in her.One thing you should learn about guys is that they are simple so all the assuming you do about his actions and all the excuses you give for his actions are unnecessary and most likely untrue.So, just see it the way it is. Keep this in mind:If he doesn't call in 1 week, if you want a relationship with this guy, give up on him.If he calls later than one week, he isn't interested in you as much as you might think he is.He is only looking to pass time or a quick hook-up.Be smart.Go on with your life and ignore him.