Like your significant other, but not quite. You're not exclusive, but you care about each other a lot and probably wouldn't be totally opposed to being exclusive.
Or you have sexual relations with that person but not really an emotional relationship?
Or, I have no idea what I'm talking about and this is all shit just pouring out of my mouth.
Sterno which is separated from the wax by squeezing it through a cloth - often a dirty sock. Sterno is a canned cooking fuel used under buffets and for camping. Squeezing it produces methyl alcohol, (methanol), which produces an intoxication when drank. Its a last resort for an alcoholic who can't afford drinking beer or liquor.