My biggest issue right now is my relationship

I have been with my boyfriend for almost a year, this is the most communicative and healthy relationship that I have ever had. I love him very much. Over the last 4 months I have seen him struggling with some big issues in his life. We talk about it when he is open but he is not doing the big work to heal, instead he is avoiding his emotions by taking on new projects and buffering with vaping and alcohol.
When we got together he was living a healthy and clean life which is something I live by. Now I am in love with him and I am unsure his lifestyle works with mine anymore. I am confused by what I should do, or can do.