Keep his information about you a mystery. For example, try to stick to a low-key bar or restaurant, or go to a party together where you can keep the mood light and festive. Save the candlelight dinners for down the road. And when you hear from him, intentionally add extra time between dates two and three to further relax his attachment anxiety. Then suddenly he comes up with this explanation that he's overworked with people and he can't squeeze in any time with you.
Men get anxious when they develop strong feelings for someone.
They start losing control of their emotions and that scares them. So their instinct is to reassure themselves they're not totally hooked. Make yourself less available, be busy. Give him space, so the relationship will feel like its not the center of the universe. This will give him time to adjust for you.