Possibly, on the intense or the 'dark' side. Him standing in the middle of the road, could mean, that he is tired of life? Or maybe something happened to him or his loved ones causing him to be unstable?
And nothing mattered to him--meaning- something that mattered to him dearly was taken away from him or maybe left him?
Not sure, how to phrase it correctly.
Also I love the sentence-
' He looked at the leaves, taking stroll on the sidewalsk, just helped by the wind once again '
The imagery and prose in your writing is really good!
