A crush is called a crush for a reason. It can break you. Most people keep their hopes up, thinking they actually have a shot. They assume that the feeling is mutual and expect that the universe will somehow lead them to the one they long for.
Sometimes, it works out; but oftentimes, people find themselves waiting for something that could never happen.
This is why we lie to ourselves every so often. Everybody saw the signs. Everybody saw it coming. It just so happens that most of us who are unbelievably stubborn still choose the lie because after all, the truth does hurt.