Thank you! = धन्यवाद्! or शुक्रिया " I miss you" = "मुझे तुम्हारी याद आती है" or "मुझे तुम्हारी याद आ रही है"

Thank - Dhanyavaad or Shukriya You - Tumhara or Aapka So "thank you" means Aapka/ Tumhara Dhanyavaad/ Shukriya I - Mein Miss - Yaad You - Tumhe While translating this into Hindi we will add one more word Karoonga/ Karoongi which will show an action in future "yaad karoonga/ karoongi" And if you are using "I miss you" in some present tense then instead of karoonga/ karoongi you will use karta hoon/ karti hoon. Here I miss you means Mein tumhe yaad Karoonga (if speaker is male)/ Karoongi (If speaker is female) - If using for future. Main tumhe yaad karta hoon (if speaker is male)/ karti hoon (if speaker is female) - If using in present tense.

Thank you = Dhanyavaad or Shukriya I miss you = aap mujhe bahut yaad aate hai

I-main. Miss -yaad karna. You -aapko. I Miss you -main apko yaad karti hu

Thank -dhanyawad.you -aap/tum. Thank you -aapka dhanyad