An alcoholic or not

I’m writing this because I’m confused and I guess want some advice I genuinely seem to have accidentally gone against anything I’ve ever been told or seen about alcoholism works. To set the scene I’m a 22 yr old female and for the last 2 years I am what you would probably call an alcoholic I drank every single night and it was all I thought about during the day I couldn’t ever imagine my self stopping even for an evening , like a bottle of wine or a 4 pack of beers on my own if I was with friends it would be much more I couldn’t go a night without I’d try and fail many times even though I was always hungover etc. 3 and a half months ago I decided to lose some weight and realised to do this I should stop drinking so much , it took about a week to be able to sleep and not feel ill after stopping drinking by myself but I made it . I never drink by myself since but still drink in social situations with friends and don’t feel the need to by myself, the cravings went after the first month or so , what’s happening here?