A Boy called me a hoe bag and usk what to say back.?

He called me a hoe bag cuz he still loves me and we have the same best friend named mitch,and I said things in a friend way to him and my q, the kid who called me a hoe bag went through his phone and got pissed and he keeps calling me a hoe bag. I don't know if I should just let it o or stand up and say something.