Literally, it means "I am lonely without you," but in more natural English it means "I miss you."
"You are always pretty."
Anata WA itsumo... (ah-nah-tah wah ee-tsoo-moh...) is "you are always..."
Anata WA debu.
'Anata ha' with rising intonation.
There are many ways to say "always" or "forever" but one way is "zutto."
Anata
Watashi wa anata ga inakute sabishii.
anata ga aishitenai
'Anata no koto wo kesshite wasurenai' is one way you may say it.
'(Anata wa) Kawaii desu'. 'Anata wa' [you] is optional to include.
If you want to say 'I need you' it would be 'anata ha hitsuyou desu'.
anata to issho