Shold I confront my husband about what I found on his phone?

I need some guidance. I’m a 24 year old stay at home mom to a 3 year old and I’m 30 weeks pregnant with twins. My husband and I have been married for 5 years and I think I’ve fallen out of love with him. He’s a great man. He works hard and provides for us. Our marriage isn’t great though. We only have sex once a month even though I beg for it. Couple weeks ago I found out he was looking at “perfect t*ts” on Reddit while at work. We fought for a few days and he told me he wanted to take a break. I didn’t want to at the time but now I think I do. I’m not sure what to do. Should I tell him or try to work it out alone?