The Lord is gracious and compassionate, slow to anger and rich in love. The Lord is good to all; he has compassion on all he has made. ~Psalm 145: 8-9
Being a Christian doesn't automatically make it easier for us to deal with the world. It takes discipline and self-control to see people the way God sees them.
Thankfully, God does give grace to all. He's generous with love, and has compassion for his entire creation.
Take a deep breath and move one inch closer to God by showing a little grace, compassion, and love to those people in your life who are hard to love. Pray for eyes to see their soul rather than their actions.
Then ask God to reveal those "unlovable" parts in yourself, and the courage to tear down those walls too.
GO DEEPER: Romans 12:9-16