What do i tell in the hospital if i want myself to be checked for depression?

If you are: suicidal, homicidal, lost touch with reality or can no longer take care of daily living functions - those could be possible reasons for admission. At age 18, would encourage you to let your family know so that they can support you. Take care.

Tell them : You are concerned about depression. They can discuss this with you further and ask sone screening questions.