Inferring Maria's Emotional State

Consider the following passage:

Maria glanced out the window, her thoughts swirling as she watched the rain streak down the glass. The world outside was muted, colors blending into a wash of gray, reflecting her own mood. She sighed, remembering the vibrant summer days filled with laughter and friends. Now, as autumn encroached, the laughter seemed a distant memory, her friends scattered across the country in pursuit of their dreams. The warmth of their camaraderie felt like a sun slipping below the horizon, leaving only shadows in its wake.

In this moment of reflection, what inference can be drawn about Maria's emotional state?