When we have core beliefs, howsoever they come about, they often define who we are, how we see ourselves and how we feel about things. Depending on what those beliefs are, sometimes that’s a positive. So for example, accepting that you’re a good person, someone worth knowing who contributes positively to their own life and that of other people is likely to mean you can create helpful and healthy boundaries, ask for your needs to be met and be accepting of the needs of friends and partners. When the opposite is true though, it can also create the gaping hole you allude to whereby you’re constantly on the alert for approval, recognition and perhaps even love from people with whom in the normal course of events a working or business relationship would be the expected norm. It can also create problems such as finding boundaries difficult to establish. Sometimes the unscrupulous take advantage of that which of course is then likely to lead to further distress and feeling used and ultimately rejected.