Xvg, I think some people just change with age and go on to remember their "party days." Some people progress into full-blown alcoholics. There's no litmus test to know where you're going to end up.
I give the same advice to everyone who is unsure about how serious their alcohol use is. If it causes you trouble, and you have a problem using without all the trouble, then you ought to seriously ask yourself how important alcohol really is in your life. How would life be without it?
I've heard through AA a few times, people comparing it to finding out that you have to live the rest of your life without brussel sprouts. Would that be stressful? Would you try to find a way around it? It's kind of a hokey example but I think it makes a point. Is that one thing (alcohol) so important to the quality of your life that you'd suffer without it?