Dreaming about going to an ice cream shop can symbolize a desire for pleasure, enjoyment, or indulgence in your waking life. The fact that you didn't get the ice cream because they didn't have cotton candy may suggest that there is something specific you want or need that is currently unavailable to you. Cotton candy could represent a particular joy or sweetness that you're seeking.
This dream might be reflecting feelings of disappointment or frustration about not being able to attain what you desire. It could also indicate a need to explore other options or find alternative sources of happiness.
Consider what cotton candy represents for you—perhaps it's a childhood memory, a specific relationship, or a type of experience. This might guide you in understanding what you feel is missing in your life right now. It may be worth reflecting on what brings you joy and how you can seek out those experiences, even if they aren't exactly what you initially wanted.