The speaker admits to being afraid of being alone, acknowledging it openly and showing some regret about this fear. They recognize that this fear affects them deeply and is a personal struggle that they cannot easily shake off. The admission reveals a vulnerability and honesty about their emotional state.
The speaker also points out that only they are experiencing this particular problem, implying that Anna might not share the same fear or emotional experience. This creates a sense of individuality in their feelings and perhaps hints at a disconnect or a need for understanding between them.