Welcome to SR!
I drank pretty much daily for many years, never got in any trouble, and fooled a lot of people including my wife who is a very intelligent person.
But I was unable to fool my body, which apparently, unbeknownst to me, was keeping score. As we age, the cumulative effects of the nightly abuse add up.
The good news is, the sooner you quit the sooner your body can start to recover. I now play competitive tennis 4 times a week year 'round with guys 20 years younger than me.