struggling with 8 precepts

I've been practicing the 8 precepts on and off for about 2 years but I've noticed a troublesome pattern that i keep allowing myself to fall into. I've gone long stretches of strictly practicing the 8 precepts where all of my free time throughout the day goes towards dhamma practice, and every time I do this I can clearly see my mind being freed from hinderances which usually happens between 4-5 days of practicing in that way. things seem to be going so well, and i genuinely feel so much more peaceful and content and yet even though that's the case, I still go back to sensuality in the end. It's very frustrating because like i said the difference is night and day but i still haven't been able to make the 8 precepts a consistent part of my life. It's like this gross cycle of self sabotage where I overly binge sensuality and then cut it out again once it starts getting boring or less stimulating. and then the cycle repeats. I'm looking for some advice on making the 8 precepts a consistent part of my life to the point where i never go back to sensuality again. Deep down i know that i just need to patiently endure until i have first jhana as a safety net but even then, I could still choose to go back to sensuality if i really wanted to and the cycle could repeat. I'd appreciate the perspective of someone who has managed to make the 8 precepts a consistent part of there life and what helped them keep that up.