I have many times been deeply hurt by the way so called friends have treated me. I can absolutely testify that (with God's help) you can forgive. It is just a question of first knowing you MUST forgive, secondly, knowing it is possible, thirdly knowing that you must activate it as soon as possible for your own good. Apparently many illnesses can start from having an unforgiving attitude. Bitterness is a VERY bad thing and can cripple you.

The best thing to do is have a forgiving heart at all times and a generous spirit towards them. If they seek forgiveness receive them with open arms. If they do not change and you cannot trust them a different matter. You must still forgive but that doesn't mean they can still remain your friend or that you can trust them. They need to earn back your trust. But love them anyway, but be wary of them