Nadi dosha is bad as it affects the health, so it should never be ignored when doing Kundali Milan. There are 3 types of Nadi dosha
Adi Nadi
Madhya Nadi
Antya Nadi
When there is a mix of Nadi in Ashtkoot Guna milan, Nadi dosha will not be there and you will get full 8 koots. When Nadi dosha comes the Nadi koot score is zero. As you can see above there is Adya Nadi for both and the score is zero. I suggest that you check Nadi Paad Vedha. If there is no vedha that means Nadi dosha bad effects will not be there. Then probably you can convince your parents about getting married to your boyfriend.
Blessings,
Navneet Khanna
Vedic Astrologer