Democracy is real, but a state which is two party FPTP is only barely within the definition. It is set up so there is no legitimate third choice, and even if there was they would have no power to accomplish anything anyway.
Whatever we currently have exists to make us feel like we have just enough choice to keep us quiet and passive, "wait for the next election" they say, "you can change things" they lie, but statistically almost nobody in the country has the power to perform real change (less than 10% of states, and even in those states only a relatively small swing-district minority).
Go vote, but you've fallen into their trap. The trap of believing that US "democracy" isn't fundamentally broken/useless. Until the baby boomers and older literally die off the whole thing has no purpose at all (unless you happen to be in the 1% of voters that matter).