The only time he ever cried was the day of his parents' funeral.

He had stood by their graveside, Sirius' warm hand gripping his shoulder sympathetically, and he couldn't fight off the sobs that broke out of him.

Tears of sadness: for the loss of hs parents, and how deeply he would miss them.

Tears of anger: for the Dark Wizard that had killed him, for the army of followers he had gathered to help him.

Tears of frustration: for the pitying looks his friends gave him, for the way even she treated him differently, more kindly.

He didn't want things to be different, and tears made them different. So he vowed never again. That was the only time he cried.

Or, at least, it was the only time anyone knew about.