Thanks to everyone who responded, especially for your prayers, advice and support.
To answer the question several people asked, yes, my husband is quite well aware of how I feel about some of his volunteering. This problem is nothing new. The rest of his volunteering is within reason, but coaching takes an extraordinary amount of his time–usually at the same time when his work is also very busy. I think he has been too busy to realize that his wife felt both neglected and pushed to her limits.
After posting on Saturday, I took my children to the park. I read a good book while they played. It felt good just to get out of the house. By the time we got back, my husband was home. It took a little effort, but I talked him into taking me out on a date.

He also bought the part to fix the broken thing in our home that was bothering me the most and got it back into working order. (I told you he could fix almost anything.) At my request, he also read through this thread and we had a chance to talk more about things. He didn’t get any office work done this weekend, but his wife is happier.
My husband will be gone again next weekend to a family event on his side of the family. I’m invited too, but between my pregnancy, my general exhaustion and an assortment of other things, I prefer to stay home. Posting this thread helped me recognize the pattern that extended visits with in-laws usually occur when my tolerance level is low because I’m already tired. I might enjoy those visits with my husband’s parents more if other things with my husband were different, but at this point, I’m not up for an extended visit with my in-laws.
Being married twenty years, there’s more history than I can neatly condense into one post. While I let my husband know how I feel, it doesn’t always affect or change what he does. For example, he knows I don’t want to go next weekend but that won’t stop him from going, and I’m not sure if I would *want *him to stay home with me if he really wants to be somewhere else. He knows how I feel about his volunteer coaching, yet somehow he’s doing that again this year. And if our children are going to play sports, they need a coach so I’m torn over that too…So on and so on.
In any case, things aren’t perfect but we have a good life. Amidst the busy-ness of life, we need to pay more attention to each other and our marriage than we do. Thanks for letting me vent here to sort through these matters. And thanks especially for the prayers.