Low self-esteem can lead to suicide. You could be self-conscious about the way you dress, how you look, and your weight. In the book, Tears of a Tiger by Sharon M. Draper, Andy, the main character, was with his friends and one of them died. Andy thought it was his fault and couldn't handle the pressure, so he killed himself. Everything I listed above is about myself and I am telling you how I feel, it makes you very depressed. However, I'm not so depressed that I will kill myself. Every time somebody looks at you, you wonder what is she/he looking at. When you're teased, you have very low self-esteem. You start to get self conscious about your self. You start to get very depressed, thinking you hate yourself for no reason at all. You start hating everybody around you, feeling negative and talking negative about people and yourself. You don't think about things before you do it, especially if it is something you want to do and it tends to make you think you want to kill your self.
When Andy was thinking of killing himself he wasn't thinking about his family, friends, or enemies. He was just confused. It's like when you mad at somebody and you want to punch them, you don't stop and think about the consequences you just do it.
When you know somebody you can talk to about the way you feel sometimes in that conversation the subject of killing yourself might come up. You might be able to hear why you shouldn't end your life. In Tears of a Tiger, Andy's psychologist convinced him not to and he lasted awhile but not long enough.