Val - But don't ever beat yourself up about doing the right thing. You hung in there, because that's what marriage and committment are about. Now the corner's been turned and you should be proud that you did all you could.
Of course he loved you and probably still does. Do not second guess that, it's too hurtful. I truly believe they get in too deep and don't know what else to do. After a time, we're worn down and over and it's time for our future... yours is awesome. Based on your loyalty, you are something to be treasured, as from your posts I see that your family does...
This is definitely the place to come and let it all out, we all understand, been there done that, again and sometimes again... but lived and survived and thrived to keep telling the tale.