“But You Know I Love You” – the First Edition
“I’ll Have to Say I Love You In a Song” – Jim Croce
“Blue” – Joni Mitchell
And then there’s Isle of View, the debut LP by Jimmie Spheeris…
I and Love and You - The Avett Brothers (Damn fine song)
(Though technically, the singer is lamenting not being able to say those words and mean them.)
Just remembered: Just Remember I Love You, Firefall
Lovesong, The Cure
Poor Meatloaf, it’s the one thing he can’t do in “Two out of Three Aint Bad” 
La la la la la la la la la means I love you - The Delfonics.
Simple answer, Cole Porter style: “I Love You” (link plays the song in a pop-up window).
Barenaked Ladies - “I Love You”
*
“I love you
And you love me
I love you
So let’s make a family tree”*
You quoted the wrong part!
I like soup.
And I like ice cream sandwiches too.
I like fishsticks.
But I love you.
Fly Me To The Moon
Fill my heart with song
And let me sing for ever more
You are all I long for
All I worship and adore
In other words, please be true
In other words, I love you
L is for the way you look at me
O is for the only one I see
V is very, very extraordinary
E is even more than anyone that you adore and …
Maybe it’s just as well. He said “I love you” in Paradise by the Dashboard Light and look how that turned out.
And of course, he says he lies because “I love you”
Michael Franti and Spearhead–Say Hey (I Love You)
Always makes me happy when I hear this song. 
Moody Blues, It’s Up To You:
When the breeze between us calls,
Love comes and lingers into our lives
And the leaves begin to fall,
You point your finger at me–
I love you, yeah…I love you…
P.S. I Love You (Beatles)
Angel Baby - “Oo oo I Love You” (Rosie and the Originals)
Sixteen Reasons (Why I Love You) (Connie Somebody or Other)
I think I Love You - (Partridge Family)
I Want You I Need You I Love You (Elvis)
Why yes, I am old.
John Lennon - “Woman”
The Moody Blues - “Nights in White Satin”
Stevie Wonder - “These Three Words”
Styx - “Babe”
I love you, I love you,
I love you, I love you,
I love you, I love you,
I love you
I love you, I love you,
I love you, I love you,
I love you, I love you,
I love you
(I Love You) For Sentimental Reasons
~Sam Cooke
What do I win?
(That’s really pretty song, too. Link clickage is strongly advised.)
The Carpenters, “Superstar”
Two none-too-popular songs that I thought deserved more air play than they ever got:
