These should both be correct
The lines show that the speaker only pretends to have feelings for others.
The question asks how these lines show that the speaker uses people in relationships. The question suggests that the speaker's feelings are not truthful or passionate. This eliminates option D that the speaker has felt passion deeply. We also do not have any sense of embarrassment or appeal to emotions in these lines. The lines speak of a superficial connection with love's pleasure. These all suggest that the speaker does not have true feelings for others.
