From The Ballad of the Sad Cafe by Carson McCullers:

First of all, love is a joint experience between two persons — but the fact that it is a joint experience does not mean that it is a similar experience to the two people involved. There are the lover and the beloved, but these two come from different countries. Often the beloved is only a stimulus for all the stored-up love which has lain quiet within the lover for a long time hitherto. And somehow every lover knows this. He feels in his soul that his love is a solitary thing. He comes to know a new, strange loneliness and it is this knowledge which makes him suffer. So there is only one thing for the lover to do. He must house his love within himself as best he can; he must create for himself a whole new inward world — a world intense and strange, complete in himself. Let it be added here that this lover about whom we speak need not necessarily be a young man saving for a wedding ring — this lover can be man, woman, child, or indeed any human creature on this earth.