Do listen to those who have your best interest at heart.Unfortunately many who are considered "insane" do not have many (if any) friends and may have family members who are in need of mental services themselves. There are many variants in how one defines "insanity". For example, you could look at the word from both a legal or medical point of view. Generally when one speaks of "insanity" one is talking about someone who is psychotic and has a break from reality.Once you question what is real and what isn't, it is time to seek medical advice. One could have other serious mental issues (such as being a danger to self or others) and yet still not be considered "insane".