Myc, asking me that is like asking why the Sun shines.
I love you because you're amazing to me.
You're smart, gorgeous with your mind and body, and you try your best with things instead of giving up, or half-doing them.
You captured my heart around the eighth time we met, and I knew I'd love you forever.
Your voice is like music, your eyes are dazzling and I get lost in them too much, your mind is a castle I wish to explore with the demons and angels it hides, your hand fits in mine perfectly, your heart is gentle and protected, and you are beautiful, inside and out.
I love you, Mycroft Holmes, no matter what.
-GL