I think all of us have broken our own boundaries and continue to break them on a regular basis. I know I have! None of us are perfect and we will continue to make mistakes.
One of the things I always remember is a quote from a guy that I can't remember (THAT made a lot of sense...) anyway, it is some guy talking to a famous successfull banker and the question is asked:
"How did you become so succesfull?"
The man responds: "by making good decisions"
That brought up the next obvious question: "How did you learn how to make such good decisions?"
And the answer: "By making bad decisions, and learning from them".
We cannot expect ot be perfect, we can only expect to try to live better everyday. And even then with every step forward we take, we take 2 steps back.
So don't beat yourself up for boundary breaking, just learn from it and try to stay commited to doing better the next time.
