Malika said that she did not talk to shivaay for a month and he couldnt be bothered. he did not miss or realize
Same thing currently with tia.
Shivaay doesnt miss her
he doent even keep in touch!
For shivaay, it doesnt matter. he cares but he doesnt prioritize that.
If tia were to cheat on him or break up or runs away.. he woul be affected only if it affects oberoi khandan.