Asking for guidance in my journey of faith

Assalamu alaikum wa rahmatullahi wa barakatuh, I hope you won’t think badly of me for sharing this-Alhamdulillah, I’ve been Muslim for around three years now, and I’m married and happy. Still, there’s this huge struggle I’ve been dealing with since I first reverted: my smoking habit. I started when I was pretty young, and ever since, it’s been this back-and-forth cycle-I quit for a while, then fall back, then stop again. Even through all that, Alhamdulillah, I’ve never let go of my salah; I make sure to pray on time. But I know this is a harmful habit, and I really, really want to quit for good. It’s just so tough, and honestly, I’ve kept this hidden for too long. Can anyone share some advice, maybe from an Islamic perspective, on breaking out of this cycle for good?