What do you suggest if my friend said they got a good high off of methadone and i wanted to try it but someone said a tiny bit can kill you?

Don't do it: Why not get high on life instead? I've autopsied a few folks who've died from experimenting with friends' methadone. The dose he tolerates might kill you very dead on the first try. Truth be told, I'd encourage you to find friends who aren't addicts. This is a dead-end road in a world that offers many opportunities for things that are much less dangerous and more fun.