All you can do now is to leave her alone, you need to give her the time and space to miss you. However, you have to face reality that you may have messed this one up and learn from it.
I know it's going to hurt like hell, but you have to avoid her social media, if you're looking at what she's upto all the time you drive yourself crazy and stay in this negative place you're in. People are only going to post photos on there of themselves been happy and having a good time, even if the opposite is true.
If does contact you suggest meeting up, if not focus on your life and you will meet someone else in the future (even though it may not seem like it now)