The more emotional intelligent you become, the less you take things personally. You start to see that other people's behaviors are often reflections of their own struggles, not a statement about your worth.
Unfortunately, people are not always going to be brave enough to tell you they're no longer vibing with you. Sometimes, you just have to read the energies, and leave the table. Take some initiative. Let go of the guilt of letting go. Have the courage to walk alone.