Never apologize for your emotions, only your actions.
It's never that one comment, that one push, that one joke. It's the one of many, that pushed you over the edge of sanity.
Read his book, watch Wills documentary. If you have been through years of struggle and difficulty, then at what should be the night of your life's carrier someone makes a hurtful comment about someone you love, who has been through a lot. You break.
Will apologized for his actions (eventually to Chris also) and that takes courage. Everyone makes mistakes, but not many have the honor to admit their wrongs.
Don't say, but he's a ridge man. Robin Williams was successful, always smiling and looked happy, yet that didn't stop him from ending his own life in 2014.