My boyfriend is so secretive

He won’t let me see his phone aaaand I always allowed him to see mine! Plus! He has always been making jokes about we should have an open relationship... after a while of all his joking I felt like that’s what he really wanted so I broke up with him bc he told me he would be happy if we had that and I told him that he should just do as he pleases THE WORST PART!!! he didn’t fight for us or deny that he wanted that... instead here’s what he:

Called me a bitch... should I say anything back? I’m so hurt I just want someone who respects me you know?