God’s word says
"If possible, so far as it depends on you, live peaceably with all"
(Romans 12:18). Evidently it is not
always possible, but we should try.
The Bible gives
us guidelines about confronting when we think we've been wronged (Matthew
18:15-17), and speaking the truth in love (Ephesians 4: 15). It tells us to
confess our own sins (James 5:16) and forgive one another (Colossians
3:13).
So this prayer is
not a substitute for any of that.
But years ago I
wrote out a fairly lengthy prayer that I have prayed many times when I've had a
"difficult person" in my life. I've found that praying for someone
softens my heart toward them, and is part of God's plan to humble me and
possibly (but not always) to heal the relationship.
This is a prayer
specifically when the difficult person is (or claims to be) a member of the
Christian family.
Maybe it will be
helpful to you.