Well, hindi ka nag-iisa... Been to that stage as well, and I might say it's really difficult especially if the feeling is still there. Some ex's still maintain the communication because they know that you had a special bond before and it's something that you both value. It will take some time ofcourse, but I think it's best that you open your heart to other people or be with your friends. Stop thinking about starting or finding a new one, it will just come naturally. Just be open.
Cutting the communication is not even the solution, just go on with your life and make her the least of your priority. Go out with friends and meet new people as well...
