Although the people who have offended you may have many times seek forgiveness from you and you too have many times forgiven them, the memory of their wrong actions against you remains with you and creates a prejudice towards them that results in a lack of trust in the future. You usually reluctant to forgive, particularly if the offender hasn't learned anything from the past. They are not sincere enough in their words and actions. You can see it through the way they treat you and you can feel how much they dislike you.
If this happens, just leave it to Allah, The All-Knowing. He knows what is in our hearts. Forgive them sincerely and treat them the way you want them to treat you.
True forgiveness involves both forgiving and forgetting and this can be achieved by understanding your own feelings as well as those of the person who wronged you, expressing your feelings in a rational matter, realizing that your relationship is more important than being right and finally accepting the other person's apology.
So, let us all forgive and forget. May Allah s.w.t. bless all of us and accept our forgiveness. Let's pray for peace and may He strengthen our iman and taqwa.