My ex moved on and humiliated me by hanging out w his ex, ex crush and people that didn't treat me right at an event.

Then called me over 26+ times over the phone and sent me text messages. I didn't open them or call him back . we broke up exactly one month. it was a 2 abusive year relationship. I'm glad that it's over but I just never thought he would humiliate me and disrespect our entire relationship just like that. I'm focusing on my healing but then I feel like my entire world just collapsed. My friends keep telling me that it's going to be okay but it's not getting any better. I feel betrayed. I never thought he would do something like this a month after our actual breakup. he chose to disrespect me in the worst way possible and humiliated me publicly by hanging out w the people I didn't like.