Consider going "no contact." Delete him on facebook and block him too, on all social media, in case seeing him having fun or rebounding with someone else may trigger you.

Keep yourself busy. Now is the time to start exploring what interests you and giving your life purpose. Just because you're quarantined doesn't mean you can't do those things, for the most part.

Talk to people who are kind and not abusive or cruel. Nurture the relationships in your life that are healthy.

You'll get through this.