What does it mean to have you for the rest of my life?

It means having you in this life, having your company in this life, and the next life is from now on, the next life. In fact, these two sentences are generally used to express some feelings, such as vows of eternal love between lovers. Of course, you can also describe the profound friendship between people, such as your life. If these two sentences are linked together, that is to say, what will the rest of my life be like after having you in my life. Generally speaking, life will be especially happy or very happy after having you, which is a beautiful expression of emotional yearning. Such sentences are more likely to appear in some lyrics or expressions of some love sentences.