If broccoli caused you the same problems, would you be in any doubt at all about not ever having it again? I doubt it. Why is that so different from alcohol? You say you can go months without drinking with no problem, so why do you think you are even considering carrying on?
If you only drink every few month, why would anyone even question it when you don't drink? And if they did, why do you care? By the way, I'm not asking these questions because I expect you to tell us the answers. More that I suspect that they might be questions worth you asking yourself.
I know that for me, there are certain social situations that I can't enjoy sober. I've just accepted that these are social situations that I don't enjoy. So now I don't go. That's okay. I do plenty of other stuff instead. If people think I'm boring because I don't want to hear their drunk waffling or watch their drunk dancing, then I can live with that. I don't owe anyone 'interesting' or 'Party girl ' anyway.