Fiancé has asked me to stop drinking alcohol

Never done anything like this but I have been trying to do a lot of soul searching over the past week. I have been drinking heavily for at least 6 years. It started with drinking at least 4 beers a day then whiskey after dinner. My finance helped me realize that I was in a terrible cycle and I stopped doing that. Then it became weekly when I would go visit my family where I would binge pretty heavily. I don’t drink k in my house out of respect for her. Then every time should be go away, I would drink at home by myself heavily to the point where I would sometimes not remember phone conversations or how I went to bed. Upon her return I would maybe still be drunk. I am earnestly trying to change this behavior and since September, I have drank 3 times. Last Sunday, I promised her I wouldn’t drink when away from her at a football game and broke that promise. She called me and realized I was drinking and hung up on me. Then she was away this entire week, and I didn’t do what I normally would have. I didn’t drink to try to solve this problem. I am trying to grow and learn about myself but I still want a few times a year when I can “do what I want” and be able to drink. I am not sure this is possible given my past behavior with drinking. I don’t crave it everyday. But there are times when I do like weekends or when I’m with friends. I think I know the answer to all of this it’s just hard to let go of that part of me. Looking for any advice. Thanks