Te extraño !

The right way to write and say "I miss you" in Spanish is "Te echo de menos". It isn't "Te hecho de menos" because "hecho" is the verb "hacer" which means "do" or "make".(Te echo de menos -the verb "echar"-). We use "echar" to say I miss you = Te ECHO de menos.

I miss you. Te extraño. I miss you so much. Te extraño tanto. It's a Spanish mistake to write te 'echo' de menos. The right way to write and say is te 'hecho' de menos.

= Me haces falta, te añoro, te extraño

I miss you = Te echo de menos