Have the men or women who have cheated, still, deserved forgiveness?

Some say: Once you’re unfaithful, you’ll never need to be forgiven.
Others say: Everyone makes mistakes. If they sincerely repent, they should be given another chance.
But when betrayal really happens to you, forgiveness is hard, and not forgiving is also hard.
What would you choose:
A. Never forgive—betrayal is either 0 times or countless times.
B. You can forgive, but you won’t be together again.
C. If the other person truly repents, you can give them another chance.
D. It depends on the situation.
If it were you, what would you choose? Feel free to share your thoughts.