On a serious note, the whole birthday thing didnt sit well with the audience. Abdu too felt bad about it (tho as an afterthought when he was made to understand how it looked bad by Salman which it reallly did.)
Now he knows they made fun of him so hes trying to keep distance. Probably instructed by his team. Also, before going out, he had a few confrontations with Sajid and Nimrit and they were actually going a little too OTT and tried to paint him as someone who is obsessed with Nimrit.
Nimrit, instead of making Abdu understand how she has a boyfriend outside, started crying and throwing tantrums like an 18 year old.
Hes not being mean to them. Hes just maintaining distance which is fine and also the right thing to do.