Do you have specific criteria for what you accept as a loving act, a loving word or stance? If so you may be excluding a whole host of interactions that are loving but that don't fall within your parameters. You end up feeling left out, empty, not valued and bitter. This video tells the story of just such a man for whom the only genuine love was pity, putting him permanently in the victim role.
If you spend much of your life waiting for that fairy godmother to come and wave her magic wand, to make you happy, BUT go to bed each night angry that you got left out again, THEN You'll probably find yourself envying other people who are smiling, happy and satisfied with their relationships. And it's all because you have an unconscious rule about who, what, when, and how you ought to be happy. The one missing ingredient is what role you play in that combination of factors.