Will there be a 2nd matched book and if so what is it called?
Yes, there is a second book in Ally Condie's Matchedtrilogy. The second book is called Crossed, and in case you're interested, the third and final book, Reached, is also out.
Does the book matched by Ally Condie have a protagonist and a antagonist?
Yes. The protagonist is Ky and the antagonist is Xander. Or else
there isn't any but I'm pretty sure its just Ky and Xander.