It's easier to move on from him if you don't see his face and everyone connected to him every time you go online.
It wouldn't be good for you to save his number. You're only going to be tempted to text him or call him.
Stop allowing your emotions to make all your choices for you, and start thinking. A reality check is in order.
Surround yourself with valuable people and your family, and try to occupy your mind with thoughts that are more worthy of thinking about.
Now is probably the best time to work on yourself.