The fear of rejection reveals the fundamental emotional drive of unity. We have a quiet internal drive to be open to the divine, to feel unification. We know that deep within but we feel very separated. Overt personal rejection stokes that fear of being cut off but cut off from what? There are seven billion people on earth. One person saying "I do not like you," is not a big deal. But oh do we fear it and oh do we feel it when it happens. Why?
Because we have forgotten how big G-d is. We have forgotten how attached we are to G-d. This rejection FEELS like G-d is rejecting us. That which creates cannot reject you. You cannot be abandoned. Look at the people around you. They are all part of the body of G-d. So are you.