Cut them, just don't hold a grudge. Forgiving them is not putting up with them. Leave them and pray for them.
Discussion
True. Protect your mental health. Forgive, pray for, cut them loose. Remember too that “forgive and forget” might not always apply. God gave us a memory in forgiveness also. “Forgetting” might cause us to trust them when we needed to cut them loose/stay away, thus possibly going through an unnecessary cycle of hurt.