You serious? This author trying to find sympathy with the cheater? It's a classic case of hypergamy. Now you're depressed that he ignored your emotions? For the shit that you caused him?
That's not how it works lady. Get the fuck over yourself. You're divorced with a step child and now a depressed alcoholic because of the terrible choices you picked. You had a great man who was still in the process in coming into his own but you waited at the fucking finish line picking out the winner. Turns out the winner didn't want your ass.