[26F] dating [36M] feels like infidelity is rampant.

I left my last relationship due to infidelity and soon after entered a new one, only to discover my current boyfriend shares similar views on cheating. I consider myself a flexible partner; I believe in letting you have your freedom, but I expect honesty if someone is tempted to cheat—just walk away instead. He promised he wouldn’t cheat, like so many others do. Recently, while he was drunk, I stumbled upon some notes on his phone revealing a plan to reconnect with his ex-girlfriend. He outlined that he would only reach out during work hours, and there were explicit comments about wanting to meet up and intimate details. Reading that made me feel sick to my stomach. Since then, I've struggled to be affectionate with him. Now I’m left grappling with the idea that cheating seems so common. He continues to shower me with love and affection, and he provides for me financially, making me feel cherished. So what should I do? Should I keep an eye on this situation and confront him later, confront him directly now, or just ignore it altogether? If he’s taking advantage of me, maybe I should find a way to benefit from this too—at least I get a roof over my head and companionship. It’s a pretty messed-up situation.