Patience and selflessness

Of all things I try to teach my son, the utmost is paying attention to how the things he does impacts those around him. I (try to) teach him to be respectful, think of others before he acts or reacts...
I'm having trouble with this lately. I feel like I'm struggling with patience and understanding. Honestly, it's because I feel completely undervalued. I feel like people just forget to take me into consideration. Try as I might, I can't convince myself to be complacent and accepting, but should I have to be? Should I have to accept it when others show no respect, no consoderation of how their actions impact me? I know, beyond knowing, that I need to be patient, but... I want to stamp my feet and demand respect.
It truly hurts me to the very core of my being to be treated like I'm nothing. Maybe I just expect too much? There has to be a reason that everyone treats me the same way, right? Like, I'm defective and expect outrageous things from people. Things like love, kindness, compassion, respect all the time, not just when it becomes too much and I cry. I mean... Am I wrong for wanting those things? Is that not how life works?