Narrated Anas رضي الله عنه: Allah's messenger said,
"All the son of Adam are sinners, but the best of sinners are those who repent often"
(At Tirmidhi and ibn Majah reported it, and it has a strong chain of narrators)
This hadith proves humans are sinful. We should always seek forgiveness from Allah sincerely and insha Allah be forgiven and try not to commit this sin again.