A man's character is his fate.

Speaking from personal experience, its NEVER easy to face the criticism of another. We often feel critics fail to understand what we express, or that they hammer on far less important issues, missing the true meaning and emotion of our work.
Your work is very good, the imagery is uplifting. And against the backdrop of what you said, I understand it better.
However, not everyone will. Perhaps you could make a reference to the darker emtions of your mood at the time and contrast it with the hope and upliftment brought by the Sun, as well your yearning to take a break.
Even if it is not VERY specific, I think there are thousands of people out there, who have expereince the same emotions. They would appreciate work like this immensely. Who knows, you poetry could be influencing many people with similar feelings for the better.
Never stop writing because some critic said your work wasn't good. There is a reason why you write what you do, and though we can all do with some growth and pointers, I believe there are many people who need to hear what you have to say.