Re: shoot the breeze and give somebody the slip
I agree that shooting the breeze is pretty common, but "give someone the slip" (to me) is associated only with cops-and-robbers scenarios, as used above, or other cases of someone literally chasing/watching someone. I would never use it to describe a relationship. It's a literal pursuit that is lost, not a metaphoric one.
The police staked out the house they thought the burglary ring would try next, and planned to catch them in the act. Amazingly, the thieves managed to enter the house unnoticed and only upon exiting were they seen by the police officers. The police gave chase, but the thieves gave them the slip, vanishing into the night.
Her parents insisted on going everywhere she went. Once, at the mall, she managed to give them the slip, and meet up with her friends in the food court. She relished that hour of freedom.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.