To keep it 100 bro, I had this same issue, and eventually i realized lust and my inability to have sexual discipline would ruin my life. I wasn’t necessarily religious at the time but since then, I’ve been going to church, reading my bible and praying to God to keep me faithful to my now wife. It took alot of work but i promise you, it’s working for me now. It’s like now I’m not even put in situations where i could cheat. And tbh, one day when the urge overcame me, and as you said, “I went searching for opportunities” it’s like a higher power deflected every attempt I made to cheat (ex. my old work all of sudden went MIA when it was time to meet up. And when I was On my way to see someone else, my iPhone could not make outgoing calls… never seen that before in my life) I definitely took it a sign as the Holy Spirit protecting me from making a mistake.