The speaker is talking to someone who wants far more than she is willing to give. She has offered a small gesture of friendliness — “a hand, a finger-tip” — but the other person demands “a soul to clutch.” The accusation “you are cruel” is sharp, but it is aimed outward: the real cruelty, she thinks, is being asked for total emotional access when she only meant to be polite or lightly kind.
The mood is tense and weary, like a boundary being set after it has already been crossed. There is frustration in the word “clutch,” which makes the other person’s need feel grasping and desperate. The poem leaves the feeling of someone stepping back, guarding their inner life, and refusing to be made responsible for another person’s hunger.