“.. that terrible feeling that you're not good enough to be loved by the people you love most, and eventually by anyone else.”

Source: Everything Is Illuminated

Speaking Of Love (1980)

Source: The Interestings

Source: The Ethical Slut: A Guide to Infinite Sexual Possibilities

Source: Adverbs

Source: Extremely Loud and Incredibly Close

Source: Eleven Minutes (2003), p. 97.
Context: In love, no one can harm anyone else; we are each of us responsible for our own feelings and cannot blame someone else for what we feel. It hurt when I lost each of the various men I fell in love with. Now, though, I am convinced that no one loses anyone, because no one owns anyone. That is the true experience of freedom: having the most important thing in the world without owning it.

Gypsy
Song lyrics, Saint Dominic's Preview (1972)

Variant: It's one thing to fall in love. It's another to feel someone else fall in love with you, and to feel a responsibility toward that love.
Source: Every Day