My best friend and myself, hardly spoke a word over this past holiday season. Been friends since '93. There have been periods of times, holidays or not, where we just don't speak. No reason, in particular, just fall off each others radars, this past season, I feel it could be, because she's going through a lot of emotions, didn't get to see the nieces that she's been a part of their lives since birth, living with them, since the second oldest was about 3 years old. If my math, serves me correctly. After her dad, passed on, she grew quiet. When my mom died, and I finalized my divorce, I grew quiet. It just is. Like family, that you don't hear from, for a while, then poof, back again! We do live, a good 1K miles away from each other. Had one major fight, back in '94/'95. Were even roommates, at that time. And then, there are the periods in time, where it's near daily contact. Both of us, stand guilty, of trying to plan girl time, and just not following through. Neither, I would say, harbor any semblance of jealousy towards the other.
She's nearing 40, herself. She's struggled with man problems, as have I. I am not sure, she'll have kids, not really sure if she can, I recall some health issues back in college.
So, her disappearance, is withdrawing, imo. And space, she needs, and space I give. And when I need withdrawal space, same is given.

Sometimes, it's just neither wants to bring the other down. Sometimes, it's just a matter, of 'oops' another day just passed, I'll call/text later, *oops*.

Caring about one another, still exists. It's just life happens.

A quick text, 'how's it going'? Could suffice.