How do I heal from this?

I have found the most important piece in trying to heal is to take the focus off of the ex-t and focus on myself. Do whatever you can to make this about you, not her. My most helpful thing was whenever I caught myself thinking about my ex-t I would stop and ask myself "what do I need" and "what is my truth?" I swear I asked myself those questions a million times a day for a while there. But it helped. Allowing myself to grieve the loss of ex-t also helped. I hope you find something that works for you soon.