Show it through your actions. lower yourself down Infront of them so they can see difference. Care for them in subtle ways. Give them a hand written letter if you can

Take care like his father

By showing care and respect. Does not include "melay baby ne thana thaya"

Sincerity
Respect by Heart
Help others

Can't say anything single hai hm ??

Give time, and pure feelings, talk to them specially when he/she is sad...

Here are six ways to express your love:
1)Offer the gift of listening. ...
2)Say please and thank you. ...
3)Tell your loved ones how much you love and appreciate them. ...
4)Offer to help someone in need. ...
5)Write a letter or send a card to someone you love and mail it. ...
6)Write your loved ones a poem of gratitude.

Tell them

Nikkah is the perfect way 😊

just tell him/her once.. be strong.. but.. tell him by yourself with clear words