If you say you love God, then you never give up on His promises to you, you never lose faith, you are always hopeful and you will endure through every circumstance. This is what it means to love God.

Love never gives up, never loses faith, is always hopeful, and endures through every circumstance.
Three things will last forever—faith, hope, and love—and the greatest of these is love.
- 1 Corinth 13:7,13