Lost

I have been married over 19 yes.stay at home mom over 17 of those to five children.my husband kicked me out in August moved girlfriend in and has been playing games on me every since.i am beyond broken and even that is understatement.in one instance from November to December he led me to believe we trying get back together.well no he and live in girlfriend we're playing a game on me.they both admitted to and laughed at.then Xmas night I got this long text of confessions about them to from him.and then she dared him send me pic of her performing oral sex on him Xmas night.needless to say he did.so my friend and I go to his family house for New year's Eve with our little ones.and because of this in January they started messing with my head and she taunted me in a picture with fake ring of her being his fiance.well he swore not true.but after that he surprised her with wedding band tattoos just to crush me.well he slipped and accidently saw it in january.but once again he had me believing something else .for over four months he meticolously covered it up perfect.then in what I call crazy week.i got all these text of things she was accusing me of and him saying testament to her character and he is ashamed of me and then I get text she was lying about everything cause she was upset he had yet to tell me of ring.so before he finally admitted I was right about ring on day 5.it was how could she do this to him..then an btw I was right about ring. Why go out of your way to intentionally crush someone you married to over 19 yrs and five kids with.its cruel and he is killing me