That's not a complete sentence, so how can anyone answer it? It is impossible to tell what you want to know.
if they hit themselves
Unless they tell you themselves, there is no way to know.
If someone finds themselves thinking about something or someone constantly, making this thing an abnormal priority, or spending the majority of their time with someone or doing something, they may be infatuated.
Just straight up tell them they are uninvited if you feel that you don't want them here. By lying and making excuses, you'll never know when that will come back and bite you.
As in like vomit sick? Then maybe, but you shouldn't be making yourself puke cancer causing or not. It's hell for your stomach, I'll tell you that.
i dont know someone tell me
You can tell if they identify themselves as a model scout and have a business card with the information of the agency they scout for.
Someone who tells another person to do something when they dont do it themselves. For example, if I tell someone not to steal but I steal myself, then I am classified as a hyprocrite.
So that they do not suffer from a Big Mac Attack.
You feel really gagged up in your throat.
With the bluntness of our society today, it wouldn't harm them any more to tell them that you are already with someone than have them figure it out themselves.