Needing love is a hole to fill, a lack. As long as one searches for "this love" outside themselves, they will search forever and never be fulfilled. This love can be perfect in one moment and devastating the next.
Learning to identify the difference can help us understand when we are trying to obtain something outside ourselves in order to fill a void.
There is a way to obtain this for ourselves, but one must be patient & kind to self and open up to allow and receive. It requires releasing judgement, fault, expectation, anger, and all those other things that separate us. One has to be sick of "the old ways that don't work anymore" and ready to make a change. It is in that moment we make a decision to access the love we have always had and just didn't know how to get to.
Duality exists in the mind. The mind "thinks" love and then feels in response to the thought. In resolving duality, we become one with everything and to come to BE this is exquisite bliss.