That is said in different ways in Japanese, 'aitai' meaning literally 'want to see' is one of the common ones. You could also say 'anata ga inakute sabishii' (lit: without you I'm lonely.) or 'anata ga koishii' (lit: You are yearned for/missed). All of them directly mean 'I miss you', just different wording.
2nd one
there is no differnece !
aitakatta
Miss you
Nic and Rocco
tangata babe
Anata o ketsujō shimasu
Miss Dowell
Mrs/Miss/Ms Natasha
ビアさん (Bia-san)
Mr/Mrs/Miss/Ms.
Anata ga inakute, sabishii desu.