In my experience I certainly developed a tolerance and it took more, then it all changed and it took less, lots less. Used to be able to drink way too much and speak normally and think normally albeit a drunk brain. In the last year, I have been drinking less quantity more often, about 1/2 as much and would lose my ability to speak without slurring, and then get the crazy thoughts. Obviously that is a sign of dependence, and where it is not "working for me" anymore.
You needs to see where you are and if you can "nip in the bud" problems a lot of people have faced it would be considered an excellent investment.