Forgiveness (christian) - is it only possible if someone says sorry or can you forgive permanently without the "sorry" first

Is forgiveness only possible if the other person who has cause the hurt says sorry? in other words if they dont say sorry (ever), don't appear to be sorry and just continues the behaviour is forgiveness (i) possible (ii) required?

In some cases it is easier to forgive someone if you dont have to have as much / any contact with them going forward - if this is impossible and you continue to have close contact with them is forgiveness even an option if there is no question (verbalised or in their behaviour) that they have done anything which might require forgiveness?