See you
Lehitraot

Thank you very much
Toda Raba

How are you
Ma Shlomcha (to boy)
Ma Shlomech (to girl)

I love you
Ani Ohev Otach (boy to girl)
Ani Ohev Otcha (boy to boy)
Ani Ohevet Otcha (girl to boy)
Ani Ohevet Otach (girl to girl)

How are things
Ma Hainyanim

The food is tasty
Ha'ochel Taiim

How much is it?
Kama Ze' Ole'?

It's fun
Kef, Sababa, Achla (slang)

It's great
Haval Al Hazman,
Sof Haderech (slang)

It's bad
Al Hapanim, Baassa (slang)