I think you did the right thing. Now you just have to work at keeping your mind busy with something else when you start to obsess about her. It will take time for the feelings to lessen but they will. Try getting out and doing things. Go to the park, ride bike, take walk, paint, read. Whatever makes you feel good. I lost a great love and it was my fault. I had to really work to get past it but I know deep down it would never have lasted anyway.