How do you feel when a person has cross the line with you like afraid has gone too far like how do you address those type of situations with them What's the best way for you to deal with it

I will let them know why I feel uncomfortable and let them know that I have boundaries.

I will let them know that there are certain things that don't go well with me and if they don't like it, they can go away.

I would politely tell them that I do not like their attitude and that be more aware of what they say and do.