Many Christian couples today are separating & divorcing & getting remarried just like their non-Christian friends. They may get counseling for their marriage, but they seem to forget what marriage is a picture of. They forget God's faithfulness & patience with them.
Until Death Do We Part - For Real - by Sam Crabtree
Is there anybody that you are unwilling to forgive? Are you sure you are a Christian?
Whatever your answer, I highly recommend the message linked below.
Battling The Unbelief of Bitterness - John Piper
We as Christians need to call sin what it is, but show love - looking to our own lives to not be hypocrites. Righteous hatred of sin is tempered by the fact we need to hate the sin in our own lives.
Whether it's sexual sin / lust, covetousness, untruthfulness, unrighteous anger, racism, unwillingness to forgive - we need to stand strong in our battle against sin - without pride & remembering the love & mercy of God toward us. Saving faith will become evident to us when we & others see the fruit in our own lives.
Then Christians must stand strong as a light to the lost world & proclaim the Gospel with a clear conscience. I'm not saying we will be sinless, but if we don't battle our own sins then we are a bad testimony of Christ to others.
(2 John 1:8-9; Galatians 6:1; 2 Corinthians 13:5)
What We Need - Kevin DeYoung