What do you expect from a relationship? There is an expectation in almost all relationships we have. We might not be aware of it until our heart gets hurt.
What do we do then? We stay away from those who have hurt our hearts. This is the easiest way, not necessarily the right way nor effective way. We stay away physically, though mentally we might still think about it. We still carry this hurt in our mind. Sometimes we also speak about it to people. Everytime we are giving our attention (energy) to it, the hurt becomes stronger. We sustain the hurt through this way.
The weak one will do that. But the courageous one will work on the inside. They will realize the expection they have from the relationship that they thought has given that hurt, and start working on it. It needs courage. To deal with the self always needs more courage. Many people are not ready to see themselves being fragile and weak inside. But if you choose this way, you will become so strong inside. Your heart is strong and protected. And you will stop blaming anyone or situation to be the reason for your hurt. Because it is always the expectation!