I was challenged with this today and it kind of rocked my evening! Instead of saying "I love you" to God each day, I am going to take a period of time saying: "I love you too".
We love Him because He first loved us (1 John 4:19). And while I do love Him, and sometimes I need to tell Him that "first", it is all because of what He has done—He saved me. He acknowledges me.
And not only that, but in saying "I love you too", I acknowledge in turn that HE LOVES ME! ((You can't say "too" if nobody says the original!)) He finds delight in me—The GOD of the entire Universe, the One who made me... loves me. He can see that I do not measure up to what He made me to do, but He loves me anyway. What more proof do I need? Is there any reason for me to search for fulfillment or approval from elsewhere? nope!
He is lovingly holding me, gently pulling away the weapons that I use against myself, assuring me of His continual love.
I love you too.