“Love you so much!” The I is lacking, but when it’s put in to make “I love you so much” it’s a different phrase altogether.
I wonder when it became a thing to drop the letter I from the phrase. It lightens it, and it takes away from the intimacy and seriousness of the saying.
We say “love you” to anyone, right? But, who do you say “I love you” to?
Just a thought.