Just think, after you disappear, do your magic trick that puts you seven feet under ground, you will be wasting the food once on your plate, be wasting the air each tree wants to give you. You will be wasting every thought you had. Most importantly, things will change if you aren't there.
Say you hate your parents or they hate you, so you finally turn 18 and move to the U.K or Spain,  you hate school so you drop out of high school and go on to make a living. Maybe be like a youtuber, or just work at McDonalds, or face the harshness all the way through 4 years of college, +2 years and become a vet or doctor, then you're living on more money than you need at least. Or say you think you're fat so you join the gym and with a lot of money get extra skin removal. You're finally happy with you're body. Maybe you're just... depressed.
Well don't fucking waste your life. Please... look in a mirror be happy, call the police on an abusive parent, or help yourself when they don't, work on the body and make yourself just how you wanna be, eat a healthy amount, face bullies make teachers pay for being jerks, they don't deserve money if they're hating you more than teaching you.
If you aren't there the one for you might disappear.
If you aren't there... someone else might jump, might cut a little deeper, might swallow those pills.
If you aren't there you might disappoint yourself.

Happiness cannot be achieved by death, only an adrenaline rush that makes you think you're happy. It's your body lying to you before it's light's out...