Husband Cheating

I just found out that my husband is been sexting with some girls and he actually has Tinder, I just found out because he is sleeping and he has his phone charging and his phone didn’t stop ringing from notifications and I went see and saw notifications from Tinder and some conversations on Instagram. I’m in shock, don’t know what to do, we been already through a lot in the past, how do I approach this without him telling me that why I’m I looking through his phone. Please don’t be mean or judgmental I already feel like shit