How much more can a person take???

My narcissistic husband went through my phone and tested someone I didn’t want to text!!!! I didn’t find out til that person texted back and my daughter showed me how to retrieve deleted texts from my phone. I was so mad so I confronted him. He made up excuses and blamed me for texting what I texted. I feel so disrespected. He said he knows he was wrong but keeps giving me excuses for his action. There’s no excuse!!! It’s wrong!!! It’s unacceptable!!! Normal people would get that. It’s just not right why these people keep getting away from treating other people the way they do.