He says he needs time to himself for a while. What does it mean?

Hi,

I just got in a relationship with my boyfriend. We've been dating for about a month, and we have been official for about 3 weeks. He's the one who asked me to be his girlfriend and even told all of our mutual friends about the relationship. He gave me the key to his apartment, and even said he wants to introduce me to his parents when they come to visit next month. I admit we have been moving rather fast. We've also spent almost every day together since we became official. Then all of the sudden yesterday, when I texted him he said that he needs some time to himself for a little bit. I'm just confused because he is the one who has been insisting that we spend time together, and then all of the sudden its something different. So, does he really just want some time apart for a bit, or is he breaking up with me?
Updates
+1 y
I finally figured out what happened. His ex wife had his cell phone turned off, she also called me ( long story / drama) So, he didn't get my texts/calls...I just ended up going over his place and he explained everything. Thanks for the advice everyone.
He says he needs time to himself for a while. What does it mean?
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