QUITE BASHING BILLY about the whole Mary Louise Parker thing
We do NOT know the circumstance, you don't know why he chose to leave her, and do you SERIOUSLY think he would have made such a decision lightly? It would have been difficult to leave the mother of his child-to-be anyhow, added to that he'd know the press and public reaction, so wouldn't have done it without good cause or reason and without a lot of thought.
It can't have been easy for him anyhow so quit bashing him about it - NONE of us know the full facts so just shut up about it.
I'm sure if you look back there's things you've done in your life which you knew you had no choice to but people wouldn't understand and would slate you for it.