Something may be happening

[hopefloats7]

So, to update my personal nightmare, H has been incommunicato for a couple of weeks and this is unusual for him. I had emailed a couple of times, which I know he read, but received no reply from him for a while. Then, I received an email saying that he was sorry for not keeping in touch but this had been a difficult month, and he did not feel like talking. He said he wasn't mad at me but had brought everything upon himself and he was very mad about it. But not at me.
Well, perhaps the holidays are making me overly sentimental, because I did send a couple of texts during the last week, and telling him I did miss him and still would like to hear from him, etc.
This morning, he sent a text that said again, he was sorry, but he didn't want to talk. I asked, "To me at all? Or just about our situation? Because I miss talking to you about general things, and am not looking to bring up our relationship."
So he called this morning and we talked for about an hour. Not about us or what we are going to do, but just a myriad of other things: our families, the holidays (he's done no decorating whatsoever), his straining financial binds, my job, our pets, etc. He is still very upset about the mess he put himself in and does not blame me at all. He still goes to work and works out, so he's keeping those constants. He told me his plans for Christmas eve/day and they include staying with his father at his house overnight, so that means (if he's being honest) that he isn't planning to spend the holiday with ow or anyone along those lines. Of course, I have no way of knowing if that's actually true.
He didn't say he missed me or anything, but I have to wonder, why the shutting out all of the sudden? Yes, he did actually call me today, but he hasn't wanted to talk to me at all, and it's nothing I've done to instigate that. We aren't arguing or anything.
Is this the beginning of withdrawal now?