You're an attorney, and you know how legal matters can be drawn out. He did make a mistake and lie to you, but his explanation seems plausible. And after 5 months, he's still thinking about you. What would it hurt to meet him ?

And if emotionally his marriage ended with the separation in 2006, legal or not, the marriage is nothing but a piece of paper after that. It's not his fault he was held hostage for three years by the legal system and a spouse who (for whatever reason) won't finish things.