ruefully
adverb
UK/ˈruː.fᵊl.i/
US/ˈruː.fᵊl.i/
Definitions of ruefully adverb
in a manner expressing sorrow or regret, often for something done or left undone.
He ruefully looked back at the poor decisions he had made.
She ruefully admitted she had missed the opportunity.
"If only I had known then," he said ruefully.