Should you ask if their ok, or just let them be?
819453
Just try to get a conversation with them.  Just seem concerned or something.  Dont try to flirt though because that will make him think that you like him.
520521
Personally I would want someone to tell me. I mean really you could be saving someones life by telling them that. If they get an attitude just apologize and figure you probably won't see them again so who cares but I would definitely say something if I were in your shoes.
905941
Good question...   One that maybe you should bring up to whom ever is over that...
742758
Well, if there isn't anything between them yet, there is no problem. Think about it and reverse the situation, if you were talking with someone in the manner you suggest, how would you feel if another attempted what you are contemplating?
777267
Is this an Etiquette question?
586991
You shouldn't have to ask should you?
204605
I would say no.  Some people just take advantage of those kind enough to help them out.  You have to know when to say enough is enough.  Asking them to help out after you've helped them out is the right thing to do.
738291
Ask if there is anything you can do for them. Usually, there is. At least let them know you're there. \n\n.
257695
You should be a little more descriptive as your definition of his N A issues may not be so N A'd to someone else.  And if they are that bad for you to ask, then perhaps you should move on.
68255
What exactly are you tryign to ask?
279126
Well if you feel you must.A proper response would be \nnothing more hurtful than whatyourself received, as\nwe dont need to escalate it to anything physical.\nRestraint is a more powerful response.
770182
You can always ask them, Then why are you still here? They are trying to start an argument, so yes I think its okay to tell them that they can leave.
59378
dont worry. just go ahead and start talking assuming nothing is wrong.
514859
Ask them if they have been eating right or if they feel o.k.
154578
If you have to ask. Then you shouldn't be with someone like that.\nThe End
472761
I come right out and ask them because its better to now know that later when it would hurt you don't be afraid just go right ahead and ask when you and the person alone ask them to there face look them right in the eyes and ask Good luck.
793471
You can always give a friendly hello and smile. That should tell them something. If they're shy, think of a non threatening question and start up a conversation. No one ever said who should start the talking. At least not nowadays.