My mom is almost estranged from us. She still loves us but she has chosen to live many states away. My dad is gone. He committed suicide in 2010. There's a long long personal story involved with all of that and there's no need to go into it here but i had forgiven my dad of all his wrongdoings so when i learned he was gone my only regret was that i couldn't tell him personally that i had forgiven him. He didn't give me that chance.
If you are on good terms with your parents, let them know you love them!