No, but if the price goes up enough, you can mine it, as I said, from places like auto junkyards where people have thrown it away.

If our usage of aluminum increases, eventually there will not be enough aluminum.

No, if our usage of aluminum increases, assuming the supply is constant, its price will go up, so people will have incentives to find substitutes. (I already gave one example: using composites instead of metal for car bodies; that mostly substitutes for steel, not aluminum, but it does substitute for some aluminum usage, and the general point is the same.) So the increasing price of aluminum will regulate its usage so that we never run out; we just keep shifting certain uses to substitutes so that aluminum is only needed for uses that are valuable enough to make it worth paying the market price.

This is not just theoretical, by the way; it has happened many, many times. Aluminum itself is an example: most of its uses are uses in which it displaced other metals, like iron and steel (a good example is car engines: most of them are made of aluminum now because it's cheaper than cast iron).