Oh, and fwiw, your H didn't "just happen" to meet "the love of his life" within weeks of your split. I'd bet money he had already started something with her before or had a history with her from before.
Also, that "love of his life" phrase - don't put too much stock in that. Sociopath Ex Boyfriend posted a bunch of pictures of us on Facebook and called me "the love of his life" - except, of course, when those pictures were taken he had the side-chick plus was grifting other women plus was lying about a whole bunch of other stuff. So appearances on Facebook can be VERY deceiving!!