I understand wanting to leave it on a good note. So, next time you talk to her be cool, calm, and collected.. and act happy. Then immediately, go NC. It'll be one of the hardest things you've ever done but you can do it. We've all gone through it. You'll feel like cr*p but it will get better... eventually. It'll be an emotional roller coaster. You'll think about her in the morning as soon as you wake up and probably will think of her every second of every day for a while but it'll get better. You just have to wait it out and keep busy. Do anything to keep yourself from dialing that phone. I often would log onto this site when I was feeling particularly weak. Reading the posts on here really helped to talk me down off the ledge in my darkest moments.