I feel insecure, on edge, and drink too much

I feel insecure in my life. I don't think my wife truly wants our relationship even though she says she does. I have turned to drinking to help relieve my repressed stress about this and other issues. I have had a drinking problem for a few years. I feel the reason I drink is not just because I like to, but because I have lately been on edge. I've been very oddly emotional when watching movies that I have been watching for years. I'm paranoid about driving on main roads. I'm very jumpy at the slightest noises.