A few months ago I started sniffing gas off of a plastic spoon. Now it has gotten worse to where I take tissue put the plastic spoon in the mower gas tank and put it in the tissue. I then sniff it until I can't no more. Sometimes Im sniffing it for around 45 minutes to an hour. What can I do to stop this! It makes my throat hoarse sometimes send makes my nose run and burn a little. Please. Help me out!

Anyway, if the OP was really happy then he wouldn't have posted about it. I'm sure he is well aware of the dangers, but is too heavily addicted to stop it. Please think over your comments more carefully in future.
Go to a doctor.
Get away from gasoline.
Self control.
theirs better alternatives to recreational drugs btw from what i know inhalants can cause irreversible brain damage very rapidly compared to other drugs