You didn’t vote for Trump. You voted for a slate of electors who pledged to vote for Trump.
Your stupid, idiot, low-information neighbor didn’t vote for Hildebeeste. It voted for a slate of electors who pledged to vote for Hildebeeste.
One of those two slates of electors was elected to the Electoral College. The other went home.
So what would happen if say Johnson won a particular state? Did they also have a slate of electors?