Sneaky husband 😡😡😡

Ok so he has a problem with being too nice. He doesn't see it. A friend of our confessed to me she was attracted to my husband. Made me super uncomfortable and I just slowly pulled out of the friendship. I've told my husband time and time again it makes me uncomfortable then he throws the "why don't you trust me" ect ect "I'm not doing anything" they've been snapchatting. Ugh no evidence but the fact they're sending pics back and forth. I deleted her and we had a huge argument. He promised he wouldn't and tonight he got drunk I got his phone and there it was HE ADDED HER wtf do I do?