I have moderate GAD, which I am not taking prescriptions for yet (I have a good reason). 

One thing that really bothers me is when I am hanging out with someone, and they are unaware of how loud they are being, or generally attracting attention (which to me is always negative). It makes me hyperaware and extremely anxious. 

I couldnt be friends with a guy because he spoke so loud, and we were having a very private conversation in a steak house which im sure half the place heard. (his + his wife's polyamorous sexual endeavours) I'll usually politely ask them to lower their voice cause of overstimuli, but it only lasts a minute. When this happens I can start to get aggravated and feel that fight or flight. I dont usually act on it, but I havent been able to successfully communicate these feelings in a way where I feel like they get it. I stopped dating a man I adored for this exact reason, he was soooo loud and outgoing and I couldnt handle it and he deserves someone who appreciates that side of him. 

Is this normal? How can I explain this to friends when its happening?  

Or, how would you explain your anxiety in general, to a new friend? 

Am I expecting too much from other people? I realize this is my problem, and my problem only.