to your friend : bogosip-da! or bogosip-u~ ("u" sound in uncle) to say respectfully : bogosip-sumnida. we don't say usually "I" or "you" in conversation....

네가 보고 싶어. <- to friend / 당신이 보고 싶어요. <- to elders or seniors.

i can't read Hangul yet.. >.< sorry.. Only if written in English..