Why does my husband/wife not have time for me? Why did we even get married, if he has to "fit me in?"
My quick reply is this and it may not be popular- If you have to "fit in" your spouse, your priorities are suspect. Whatever you think is important, you may need to revisit. If all your spouse is getting is leftovers, you may soon be an ex-spouse. If that happens, your priorities change rather quickly and sometimes not in your control. Obviously, I am oversimplifying to make a point.
Clarify what your values are and then live according to those values. If family is important to you, and you know the single most important thing in keeping the family together is your marriage, it stands to reason that you would work on your marriage proactively, before there were problems.
Instead, our ego gets in the way. "I am too important (busy) to do that," he thinks to himself. Then he rationalizes that it is more important to work that many hours than it is to spend quality time with his wife. When his wife starts cheating on him, or starts the divorce proceedings, he realizes that his logic stopped at a certain point.
Good luck working that many hours AND doing all the single parenting required when divorcing, oh yeah and the distractions that go along with divorce. Realistically, it is easier to stay married, spend time with your partner and reap the rewards of a good marriage. The price? Spend time with your spouse.
Look at your ego. When you are too busy, you are saying how important you are. When you are too busy for your spouse, the message is clear, "I am important and you are not." Try being on the receiving end of that message from your spouse and see how you respond.