An Ugly Affair

So... I left my husband around 9 months ago do to domestic violence. However, I had honestly hoped he would come to his senses and get help so we could be a family again. Instead my wonderful husband who claimed up until I left that I was his on true love the love of his life his the only one for him is engaged and has been since 3 months after I left. Now I'll admit I'm not a good looking woman but he definitely scraped the bottom of the barrel with his new woman and I constantly swing from wondering if I'm worse looking than I thought to thinking he must be really desperate... Does anyone have any advice on dealing with this kind of betrayal?