I believe in symmetry, or balance. For every Yin there should be a Yang. If you're eating something salty you need something sweet. If you eat something dry you should eat something most.
Balance is important to our health in many ways, too. You need the right balance of nutrients in your diet, the right balance of exercise and rest, and the right balance of stress and relaxation. Yes, stress is good for you but only in the best of conditions. Relaxing is good for you but you need to be active, too.
In a romantic relationship you may find that two people often balance each other in unexpected ways. They say that "opposites attract" is a cliche but in my experience it is often a very honest cliche. I have known many couples who seem at odds over everything.
Although you certainly want to enjoy your favored activities with your romantic partner you both also need some time away from each other. After all, "absence makes the heart grow fonder", as they say. But we mustn't lose ourselves in our relationships for if anything happens to those relationships, such as the loss of a partner, we find it very difficult to recover from the loss we feel.
My friends who set aside time away from each other seem to be very happy. My own partner and I also spend time apart more due to work than anything else. When we spend time together it is, for me, more pleasant and enjoyable.
And sometimes you may have very good reason to spend time apart, such as when one partner is preparing a surprise for the other. But it may be that long-time partners are spending too much time together. Although this won't be true for all couples, if you are feeling distressed at being so close to your loved one for such long periods of time, why not shake things up?
Symmetry in love includes spending time away from each other as well as with each other. That is how I see it, anyway. I hope you found this bit of rambling worthwhile.