Guy's Behavior

"We will catch up soon, let me know" - what did he mean by this?

I've been dating a guy for a few weeks but recently he asked for more space. He had many things going on at work and had to take the time to think about what he's gonna do next year. He messages and calls me regularly. We spoke on the phone today and he asked if we are going to see each other before Christmas. I said it would be good. He said he's going to be busy with work this week and started talking about the weekend. But I said I already made plans with a friend I haven't seen in ages. He said it was okay as he also has things to do. Then, he said we could try next week. And he told me to let him know. When we were saying goodbye he said "we will catch up soon, let me know". What does it mean? Did he just say it to sound polite but he isn't planning on seeing me or what? Plus, he was saying he is going away for Christmas and New Year's Eve or spending it with friends and he mentioned I'm seeing my family and friends. So it seemed like he showed some distance between us. I said I didn't have any specific plans for the New Year's Eve and he started saying he was sure I was going clubbing etc. Should I be worried he doesn't plan is to Spend holidays together or is it just too early in dating?
"We will catch up soon, let me know" - what did he mean by this?
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