1) In a rueful manner 2) Remorsefully 3) Ruefully 4) With penitence 1) Regretfully 2) Remorsefully 3) Repentantly 4) Ruefully 
contritely, contriteness 1. Sincerely penitent or feeling regret or sorrow, especially for one's own actions; apologetic. 2. Done or said out of a sense of guilt or remorse. 3. Deeply ashamed of past sins and determined not to sin in the future.