Not sure what I should do about this...

Hey ladies, so I have been with my husband for 10 years(married for 4), he has always had a slight issue with jerking off... but lately it seems he would rather do that then wake me up or let me know. Long story short: he is always telling me he doesn’t do it much anymore because our sex life has been really good, which is it has. But... I had a feeling yesterday that something was off. I looked through our phone bill and noticed that he was texting a number I didn’t recognize early in the morning this week. I was able to look through his watch(his phone was on him but he left watch home that day) and saw text messages between him and a girl, him asking for pics and wanting to video chat. He did this while being up our youngest child and I was sleeping upstairs. Now I have gotten past the whole jerking off thing, but this I don’t think I will ever be able to get past. It feels cheating.. like I’m not enough and never will be. What are your guys thoughts on how I should go about confronting him and what are your opinions on the situation? Thank you ladies!