Stupidly, I split up with my partner 6 months ago, then I realised that I'd made a mistake but it was too late. She has already moved out and rented another place and say's she is happy and there's no way she would want to get back together. She say's she is happier than ever and can focus on herself. But I am devastated. I miss her so much and I can't move on. I don't know what to do.