Short1: I think sometimes when you take the "reality" out of the situation, it becomes mostly fun and games. Reality, meaning - real life stuff - kids, illness, aging parents, bills etc. Oh, I'm sure they have the bills - maggot has the clothes to prove it, but the rest - its just Love Love Love. Blah Blah Blah. And they SO believe this. My ex's answer to everything is "Because she loves me". Its like in all that time - we didn't love them.
My timeframe when we split was the same as yours. I joined the bb during the first week of Nov (in 01) - my bb idenitity was changed once. But my ex and I were together 30 years, married for 25. SO friggin unbelievable!