Yes, she is in love with him, and yes, in spite of his qualms and inner hesitations, he loves her back, however improbable that might seem to him. Note here for the record that he is not someone with a special fixation on young girls. Until now, all the women in his life have been more or less his own age. Pilar therefore does not represent an embodiment of some ideal female type for him--she is merely herself, a small piece of luck he stumbled across one afternoon in a public park, an exception to every rule.