Paul gives us some good advice on how to love one another in Romans 12:9-18.
Love must be sincere.
Cling to what is good.
Be devoted to one another.
Honor one another above yourselves.
Never be lacking in zeal.
Be joyful in hope.
Be patient in affliction.
Be faithful in prayer
Share with God's people who are in need.
Practice hospitality.
Bless those who persecute you.
Rejoice with those who rejoice.
Mourn with those who mourn.
Live in harmony with one another.
Do not be proud.
Do not be conceited.
Do not repay anyone evil for evil.
Provide things honest in the sight of all men.
If it is possible, a far as it depends on you, live at peace with everyone.
