I love you, O LORD, my strength. – Psalm 18:1
God loves us first and it’s not just an ordinary love but an unfailing love.
Why not give Him the love He’s worthy to receive? And I believe that simple words “I love you” and show how you love Him means a lot to God and He is very pleased to you as His son or daughter.
“I love you, LORD” is also acknowledging God in our lives. That we need God and we love Him. It is also submitting to His will and doing our best not to break His heart or asking forgiveness if we do wrong to Him.