It sounds harsh, but no contact, at all. If you talk to her, and message, and see what she's up to on social media constantly, it will make everything that much harder. Focus on yourself, try and forget about what she is doing as much as you can, it won't be quick but it's the best way I know to get on with your life. If she really wanted to be with you she would not have broken up with you, or asked for a break.