Betrayed him? Let him down?

You have no obligation to him, He’s not your child, brother, father or at the very least husband. This is a guy you dated while he was either divorcing or dating other women. You owe him nothing. Zero obligation

And please do not buy anything he tells you about his ex. No woman would divorce a wonderful husband and devoted father so she can raise a toddler alone. I am sure that how she referred to him “abusive alcoholic” is very accurate.

So what you said hurtful things? Who wouldn’t? Mother Theresa would say hurtful things if she was treated like crap. You were supposed to bow down and say “thank you” in response to being blocked? Your expectation of how women must behave when mistreated by men is not reasonable. There’s zero reason to be obedient and submissive to anyone, let alone some dude.

Stand up strong and hold your head high. Be proud of yourself and focus on yourself and other good people. He isn’t one