I'm so unhappy after three years of trying to make things work should I just leave or give warning?

Honnestly I've been at my breaking point for the past year. My OS for the past three years has been ignoring me by sleeping all the time. It's at the point were I feel like the only reason I haven't left him is because I'm to embarrassed to admit to my family it isn't working. I feel that I have no respect or trust towards him anymore. We haven't been intimate in a year. I just can't anymore. I feel like I've done everything to help the situation. I've told him how I feel about having no attention and no support for anything I chose to do. He just wants to argue and after five years my heart just feels so blocked. I'm posting this anonymous because I'm embarrassed tbh.