"Late February, and the air's so balmy snowdrops and crocuses might be fooled into early blooming. Then, the inevitable blizzard will come, blighting our harbingers of spring, and the numbed yards will go back undercover."
"... if you care, don't let them know, Don't give yourself away ..."
to give away - to reveal or make something known, often unintentionally; also, betray or expose someone
She gave away her true feelings.
He gave away his accomplices.
This idiom is sometimes put as give oneself away, as in If you don't want the family to know about your gambling, don't give yourself away by spending your winnings. (The American Heritage Dictionary of Idioms)