This was one hell of a prank

So I USED to like this girl named Hailey ok? And we don't go to the same schools anymore. But this one girl named Anna KEEPS getting onto me about liking her. I remeber her telling Hailey I wanted her adress and freaked me out after she told me her 5'10 bf would beat the shit outta me. Turns out it was a prank. Ima get them back tho. What should i do