I miss you a lot.
I miss you and I love you more than ever
That means "I miss you more every day".
I would say "I don't miss you at all/I'm not missing you at all."
I miss you much more pretty [little/cute] sister.
i miss you more then there are grains of sand on the beach
(Literally) 'Mas extrano que la ficcion' (tilde, ~, on the 'n' in 'extrano'; accent over the 'a' in 'mas' and 'o' in 'ficcion')
Te extrano
In Spanish "I miss you" is te extrano and "I love you" is te amo.
Te extraño means I miss you.Te amo means I love you.
Te extraño cariño
Do you mean "Te extrano"? It means, "I miss you."
Te/le echo tanto de menos Te/le extrano tanto (tilde, ~, on 'n' in extrano') (Te/le - informal/formal)