It sounds like working on what 'rejected' is to you, what it means, how it works within you, what it feels like to you, when it has happened in the past, etc. would be a good place to start.

Other good areas to explore with your therapist are just simply how thoughts can become more than just thoughts; we believe what we think even when what we think is not based on reality, but on our fears. Where do our thoughts stop and another's begin. Do we expect others to have the same thoughts as we do? That's an unrealistic expectation, as we are all separate and we each have our own thoughts. And thoughts are just thoughts. I can think the ocean is pink, but that is just my thought and isn't real. Silly example, but we do that with others, thinking we know their motivations, their hidden agendas we suspect them of having, we think we know their thoughts, but we can't.

Also helpful to explore, and relieving to accept:
That we can't know what we can't know.
That we have no control over anyone or anything but our own self.
That communication can be simple and clarifying.
That fear can be worked on and overcome in layers.
That we can hold opposing thoughts about one thing or one person, and we don't have to push someone away when we have these thoughts; it isn't an either/or, it is the way relationships are. (I really love this about her, but I really don't like that about her.)
That running away is only running away and doesn't fix anything.

and many more. All kinds of things to explore and learn more about where our fears come from, how we view relationships, how we view ourselves, how we can get what we need and even discover what it is we need because that can be hard too. all these things and many more we discover and work through in therapy. Hard and rewarding work. To understand better, to be able to have more realistic expectations of others (and therefore, fewer intense fear and anger reactions), to see our own self worth. So many things that can be better understood to bring a more peaceful and calmer inner world.

I don't think there is one description of 'cured', but there are many layers of freedom and peace. The wonderful thing about the journey to feeling better is that we feel better as we go along. It isn't linear, so we may feel better one week than another, but over time progress will show itself to be a relieving of symptoms and a mind that is freer.