Is there someone you care about that keeps ignoring you? I mean everything was going fine, you were both chatting, exchanging stories, sharing experiences, it was heading somewhere, and then suddenly the person cuts you off. It could be frustrating I know, but there is something you can do.
The solution is to cut them loose as well because the person does not belong to you.
See it as he or she was unable to get rid of the doubts in their minds to be close to you, so move on with your life. Tell yourself that the person was afraid of loving and losing you.