If it was that easy for you to find out the truth about him, he is a real f*cking idiot. He lied to you so easily and you believed it until you did your background check on him, which clearly you noticed some red flags from him or you wouldn't have checked in the first place. Once you confronted him about what you found, he ignored you because the game is over. He knows you know the truth and why would he bother continuing this game if there's no game left to play? You were played by a guy who was either bored of his life, or so greedy that he wants to have his cake (wife and kids) and eat it too (play mind games with you). You can see how easy it is to send someone a text message that says how much you care about them, want to see them, and ask about their day... it's so easy, it literally takes ten seconds of effort and nothing else. Him sending you texts weekly, and on holidays, isn't even close to expressing love. It's the exact opposite of love, actually, because at times when he should have been giving his family love and attention, he was sending you messages. That is so unfair to everyone involved. It's not your fault that he chose to lie to you and give you attention. If he'd told you about his wife and kids I highly doubt you would have entertained the idea of getting to know him, and he figured that out as well. He created this lie to get attention from you, when he wanted, when it was convenient for him; and he used you as a distraction from his own misery. None of this is your fault, but please, please do not waste another second of your life and energy on a person who can so easily lie and manipulate everyone around him.
Closure isn't a real thing. We all crave it, but honestly, what could he possibly say to you to make you feel better about this, and what could he do to actually give you "closure"? Probably nothing. And even if he could say, or do, something to help ease your embarrassment and pain of being lied to, it still won't feel like closure. Use THIS as closure. Use the horrible feeling you had when you discovered he was lying to you all this time as closure. Use the frustration and anger and disappointment to motivate you into moving on. You deserve better than to be treated like this, and there are FAR better men out there than this guy. So what if he has millions of dollars, he is still an asshole. Don't waste any more of your energy on someone who is committed to lying and manipulating you, because I guarantee you that if you continue to try to contact him, either he will never talk to you again, or he will come up with some other way to continue this lie, and to continue manipulating you until you've wasted years of your life on someone who doesn't actually give a f*ck about you. This may sound harsh. And it is. But that's because what he did was sh*tty and you do not deserve to be treated like sh*t. Do not think for one second that you owe this guy anything. You don't. Focus on yourself and your own needs and focus on doing things that make you happy and feel good. Eventually you will move on from this and you can, and will, find someone who is ready to be there for you, for real; and whom cares about you and wants to be with you. He's out there, you just have to believe it, and believe in yourself.
Best of luck to you. Sorry you got catfished.
"Caring is not an advantage."