תרגום - יוונית-אנגלית - Μου λείπεις..

Hi stami,

Would you please use caps, specially for the pronoun "I"?

hey! You can also say: "I am not going to swim"?
Hmm..what's the difference,really?
I don't know..I think your translation is ok!

"Hello Giant" would sound better as "Hey big guy (or girl)"
I think "big guy/girl" is the closest friendly vocative that we have in English. And "Hello" sounds a bit too formal for this context.

I'm not going to get into the sea -> I'm not going to go into the water
This is a more natural and common way of saying it.

hi big guy may be better than hello giant

Hey big boy(girl) or guy(gal)
Let's go have a drink on the beach, don't worry (calm down) I'm not going to go into the sea. (or I am not planning to get) I've eaten a lot and I can't sleep, ok? Are you sleeping? I miss you...