You are the most important thing in my life, even more important than my PhD thesis.
There are more important things than you in this world, but I haven’t found any yet; I mean, it is logically possible that they are there…
How impossibly beautiful you are! Just like the round square!
You are my everything! (Depending on how you define “everything.” And also “my,” and “you.”)
I love you more than mere words can express. That’s a contradiction.
I mean, I love you more than mere words can express, where “love” refers to something which cannot be otherwise referred to.
If it is the case that I don’t love you, 1 plus 1 would equal 3. But 1 plus 1 is not equal to 3. Therefore it is the case that I love you.
God gave me free will to love you! That’s assuming that God is omnipotent, omni-benevolent, and there is no such possible world where there is no free will and is better than the actual world.
You are the most beautiful woman I have seen at this moment!
It cannot possibly be thought that it is not the case that I don't not love you.
If you clear all thoughts out of your head for a moment, you will experience the all-embracing love that is present in the universe. Actually that’s just me.
You know I love you. Loosely speaking. Heck, if Hume is right, we can’t even know the sun will rise tomorrow. Strictly speaking, you can’t know I love you…
…how do you even know that I exist, not simply as a figment as your imagination?
If you are a brain-in-a-vat, I want to be your vat.
You are like* the stars in the sky!
* similar in certain aspects, not necessarily more than one. Similarity in material composition would suffice.
I can’t live without you! Every time I am alone, I am actually “living”.