No one here will push you, especially if you are young and could have your entire life ahead of you full of wonderful and amazing experiences you can not even imagine right now... this forum does not encourage suicide, this is a support group. So if you do not want to share your pain and why you want to do this, nobody here can really help you.
Propane could put a lot of other people at risk. Even inside a home that is empty , a simple flip of a badly wired light switch, or hot water heater , among various other unknown factors inside your home that could cause a lot of damage, maybe even a fire.
Also if someone comes inside your home, if the propane is in high enough volume it could kill them as well.