Sometimes we forgive a person, but it gets difficult to forgive ourselves, kindly dont drown into sadness and pain and FORGIVE URSELF!!, we r not perfet, the only perfect is God" we are tought from everything in the life. your mistakes are not for killing you, but to make you better.
If you can do something to make it up, just do it, without wasting time and make an effort not to repeat the same action or word again.