It's terrible when the "ex" turns out to be right. I hate that.
But you are right he can't take away your good day. Just remember he doesn't define who you are. Take care and forgive yourself. We all make mistakes.
__________________
Bipolar I, Depression, GAD Meds: Zoloft, Zyprexa, Ritalin
"Each morning we are born again. What we do today is what matters most." -Buddha