You went out with ur friends without telling Ren, of course he got worried and spammed text you.

"Pookie are u okay?? PLEASE reply" "where are you?? I'll pick you up just tell me where u are" "DID U GET KIDNAPPED WHY AREN'T U REPLYING" With lots of crying emojis.

You didn't reply since ur phone was on do not disturb, He was at home worrying about you while ur out with ur friends.