My work-wife (boss/dear friend) and I have been working an inordinate amount of hours together lately, and things are only going to get more intense over the next month. When we received the offer of a dog-/house-sitting gig (usually we take turns handling these), we decided to do it together. If you're already spending 12 hours a day with each other, you might as well just go for it!
Usually, I am strongly in favor of alone time, downtime, and independence, whether we're talking couples, families, or coworkers. However, there are times when a concentrated dose of togetherness is inevitable, and I say instead of rebelling against it, settle in and make the most of it! Walk the dogs together, make and eat dinner together, finish up projects at the table together, work out together, go out for drinks after work together, and let your life be like a combination bootcamp/sleepover for awhile. Soon enough your home or work life will be back to normal, with time for just you and a much less intense rhythm. And, ideally, you'll look back fondly on that hectic time, remembering the coziness around the dinner table and the chat-filled walks rather than how exhausted your feet were and how impossible the deadlines felt. You might even miss it, a little bit.