Embarrassed

P said some out of line shizzle to me not too long ago. I would tell you what he said, but I would be too ashamed, frankly.
Any way, I called him and talked to him about it yesterday after not talking to him for two weeks, and he told me that what he said was meant to be "light-hearted" and "if I took offense to it then that was just me."
I was numb. I didn't say anything...but this: "I'm not mad at you. I'm mad at me for letting you get so comfortable with disrespecting me. If you ever say something to me like that again, we will not be cool, we will not be friends."
His response, "I don't respond to ultimatums."
Oh, so it's an ultimatum to show me some respect?!
After a friend called him and called him on it, he sent me a text, apologizing right before he brought up some off-hand example of me offending him. I personally don't believe that because I don't believe he can be offended.
The moral of the story: I am so embarrassed. I am embarrassed that I am hurt by the words of a man that doesn't give a shit, clearly. I am embarrassed that I am his friend after 19 years of watching my mother get disrespected. I am embarrassed that I am trying to justify his out-of-line words after seeing my friends and the women around me get disrespected. I am embarrassed that after 25 years of being stern on not disrespecting myself, I did so by letting him do it for me. I am embarrassed that I am even taking time to vent about this while he is probably going along with his day, not concerned.
Am I hurt? Yes. Hurt and confused. I don't get how I am thrown cruelty daily be strangers but somehow, his words always shatter the glass.
Brownie said let it burn and my girl said his friendship to me is poisonous. All I can say is, either way, I don't want to be my mom. Period.