Answer:
It depends on the situation
Step-by-step explanation:
Some people will never apologies whether or not they believe they are guilty of whatever the situation entails. In an instance as this then no forgivness does not require an apology. Forgivness is not necessarily for the perpetrator. Forgivness if for the person who was hurt. Harboring unforgivness can cause many health and mental issues. Many experiments have been done to prove this.
In april of 2005, 81 adults completed multiple questionnaires and participated in a laboratory interview about a time they were hurt or betryaed. Heart rate and blood pressure were recorded during a 10 min baseline. 5 measures of health were recorded during these interviews; physical symptoms, medications used, sleep quality, fatigue, and somatic complaints. All factors either partially or fully mediated the effect of forgiveness on health.
The example is heavily simplified here but it ended up showing the negative effects on each measure of health when you harbor unforgivness rather than letting that go and moving on with your own life. The person who hurt you isn't writhing in pain thinking about what they did, you holding that anger is only causing you to be continually hurt by said situation. Forgiveness does not require an apology, it would be nice to receive one but it is the responsibility of the hurt party to move on with their own life rather than holding onto something that is only further hurting themselves.