Get real! informal slang
The slang is often used as an imperative.
Used to advise someone to quit being silly or irrational about something and to start thinking about it in a sensible way, or being realistic.
Hey, get real! You just can't afford to pay that much money.
"She thinks Tim is having a crush on her" - "OMG, get real! He already has a girlfriend".
The slang dates from the second half of the 1900s.
people often do irrational or foolish things when they are in love.
I and my boyfriend have decided to get married in the summer. I don't think that's wise, since we won't have enough money saved by then to set up house. But then, one cannot love and be wise.