I disagree. In my opinion, love is solid enough to say I am sorry.
When someone you care about is genuinely sorry for something, forgiveness is the next step in the healing. And a major part of forgiveness is then forgetting. If you need to hang on to the disappointment or hurt feelings, you are not ready to forgive.
In Ottawa Hypnosis, this is a good description:
"It is an act one does with oneself…not with another. One person cannot forgive another! That is the other person's task. Obviously it is very difficult to give up a long held, deeply imbedded emotion such as fear, anger or revenge, etc. Usually the emotion is entangled and ensnared in all sorts of justifications, excuses, defenses, habits, addictions, etc. The pathway to love is forgiveness. Forgiveness dissolves resentments and jealousies, etc. Reluctance to let go of fear keeps people "stuck", alienated from experiencing the present moment, and fully living life. If we learn to continually practice forgiveness we see each other and ourselves as blameless. Forgiveness is a powerful tool in our struggle to transcend "the blame and shame game.".
Forgiveness. Healing. Moving forward to more adventures.