and how do i say to people when i want to be formal with them?

You may want a second opinion on this as I'm still learning but... You've missed me already? - 나를 이미 보고 싶었어? Can I talk to you at this moment? - 지금 이야기 할 수 있어요? 괜찮아요? I feel a little bit awkward - 난 기분이 조금 이상해. I wrote these assuming you'll be saying these things to people you're close with. You'll have to say these things differently if you were to say these to people you're not close to/people you have to be formal with.