I Can't Get Over My Boyfriend Cheating On Me

I thought my heart was broken before... i recently found out my fiancé has been cheating on me since we lost our baby. he’s been spending more and more time at “work”- he told me this was a good way to keep his mind off of Madelyn. as i am laying in bed every night crying at the loss of my sweet girl; he is out screwing another woman. He told me, she can give him something i can’t, as if the miscarriage was MY FAULT. my heart is hurting 😭💔.