You can let that text upset you, or you can read it a different way...
That you dodged a huge flaming brown bag full of dogshit, bullet by not being the moron who married him. That someone else is legally stuck with someone who is a liar in that he will promise monogamy, but never actually do it.
Then after you say "whew, thank god it wasn't me." Bake some muffins, look out a window, and smile.