regretful

adjective2

1. •
   Full of feelings of regret, indulging in regrets.

   • I continued also the wish to be with you, and experienced a strange, regretful consciousness of some barrier dividing us. — 1847
2. •
   Sorrowful about what has been lost or done.

   • "Dionne, one: I am seriously regretful over last night's lapse," — 1997