[32F] facing challenges with her partner's [36M] unhealthy habits after years of trying to be patient.

My husband (36M) and I have been together for nearly ten years and married for a couple. When we first met, he was facing significant challenges—grieving the loss of both parents and trying to manage a family business that he wasn’t equipped for. His lifestyle was quite unhealthy at that time, but I was drawn to his kindness, particularly in how he cared for animals. Over the years, we've created a life together—sharing a home, running a business, and rescuing several dogs along the way. Although many aspects of our lives have improved, his unhealthy habits (smoking, substance use, irregular eating and sleeping patterns) have remained largely unchanged, despite numerous discussions, therapy sessions, medications, and attempts to quit. I prioritize my health and take care of myself, and I want the same for him—not just for his own well-being, but for our future as a couple. I've always tried to be patient and supportive, but it feels as though we've been trapped in the same cycle for years. He recognizes the issues, agrees with me, and makes small efforts, particularly after arguments, but nothing seems to be sustainable over the long term. I love him deeply, but it's difficult not to feel resentful. I don’t want to leave our relationship, but I also don’t want to spend my life watching someone I care about slowly self-destruct. How can I balance being patient with setting my own boundaries without feeling like I'm giving up on him? Has anyone else gone through a similar experience?