His calling you might not be as sinister as others think. People are creatures of habit. And if he saw you every two weeks (and I am guessing talked to you almost daily), and then every day for a whole summer, it becomes habit to want to talk to you. When he decided to tell you he needed a break, he probably had not thought about how he was going to fill that time void that used to be taken up with talking to you. So, he fell back into his habit, which was talking to you.
I agree that normally a "break" means that the person is looking for someone else or has someone else already lined up. Maybe this new person didn't work out and now he is regretting his decision with you.
He could also just have moved beyond faster than you have and does really want to be friends. Breakups are like grieving and everyone does it at a different pace and in a different way.
Finally, reeba is right on the money when she says that guys are pretty direct. It is possible that he is confused about how he feels, but your being direct would be a welcome to him as it would give him the chance to just put everything up front. Be prepared to hear anything though. If you don't think you can handle certain answers, don't ask the question.
Good luck.
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