Apologizing to people I hurt

At the beginning of the lesson, the lecturer started talking to us
 about forgiveness and apologizing to people we hurt.
 After all, every person is not a tallit that is all blue.

Then during the lesson I thought who I should apologize to, 
and I apologize to my grandparents who took care of me when I was 
little and I didn't visit them enough and to my parents who raised me
 and I didn't appreciate them enough.

Thank you very much for everything you have done for me over the years
 and what you have contributed to my life.
I apologize and appreciate you very much.