Let's try to smile more.

Resentment, frustration, and loathing are all byproducts of an unfulfilled self.  Finding faults in others is the easiest way to ignore your own.  To overcome this hurdle, one must accept imperfection and eliminate fear through love and compassion.  If you treat others with care, you will not worry whether or not they will reciprocate.  The only side you can control is the one on which you stand.  Purge this guilty habit of judgement, and accept the flaws and idiosyncrasies as the beautiful diversities that they are.  Everyone will feel a lot better, I promise.