Generally, it has the sense of emphasizing on a person's particular character or way of being.
some words are missing in your sentence
"you are so cute"
this pleasure is so .....
so much, very much
merci de travailler tellement dur means "thanks for working so hard" in English.
In French, you can say "Tu es tellement agaçant(e)" to mean "You are so annoying."
i vous aime tellement
I would very much like to....
I love you so much
If you mean 'elle' as in French, it is hi.
elle s'assoit mean she sits or she's sitting.
Elle a faim means "She is hungry".