If you’re happy - then you have peace and if you’re not happy - you don’t have it. Anything that undermines your peace undermines your happiness.
Happy people are at peace within themselves with others and with God. Those three spheres are connected ... and they begin with God. Peace with God paves the way to peace within ourselves and equips us to make peace with others.
What is the "conflict" we have with God anyways and how can we make peace?
The literal Good News is that Peace with God is possible because God has made peace with you through Jesus, His Son. Peace with God begins by faith in Christ and Peace with God is sustained by obedience to Christ.