Suicidal, Hearing voices. Health issue.

I've been lately getting suicidal thoughts. But I really don't want to die. I hear voices whispering that I can't understand. I've tried alot of times to tell my family about this. But everytime I tell them, they scold me telling suicide is just cowardice. You're brave etc etc. In order to keep myself away from such thoughts I try to mingle with everyone. I try being jovial with everyone. My family members don't believe me because they feel I don't have a reason to die. Sometimes I feel like I'm the most bravest amongst everyone & at times I feel I am the weakest. I get attached to people too much and spend alot of time with them. Then suddenly I want to stay alone. Just alone by myself. Because of this I'm spoiling my relationship with my family as well as friends. I'm very close to my mom. But when I try telling this to her, she laughs at me and says don't act like mad. Yes, I'm now getting confused if I'm going mad or is this some kind of an health issue.