Making a decision and sticking to it

I have recently made the decision to stop a relationship I was in. I had been going back and forth about this relationship because I am so in love but he wasn’t showing up in the ways I needed. I was unconditionally loving him and I reached a point where I needed to put that back into myself. I guess I just need some coaching on making the decision and moving forward now that I have. I’m having thoughts around going back and changing my decision. Thanks for any guidance!