It just means you have a problem, similar to a medical disease, which needs treatment. If they do, they are the ones who need education and to be more open-minded. Even if you are hospitalized for your problem, it doesn't mean you will be there for days, weeks, or longer. Just like in the ER, you will be assessed, treated, and released as soon as you are feeling better. Being suicidal means I'm crazy.
Suicidal feelings are most often symptoms of depression or a related mood disorder.
Feeling suicidal does not make you any more or less crazy than anybody else. Suicidal feelings go away once you begin to receive adequate care for your depression or other mood disorder. Had the person been receiving adequate treatment, they could be alive and feeling much less depressed and suicidal. Whether that professional is a psychiatrist, psychologist, or other clinician specially trained to diagnose and treatment mental health problems, you will always receive the highest quality care and treatment when seen by one of them over a general practitioner. Mental disorders should be taken as seriously as any potentially chronic and disabling medical condition.